In the theme Side Out, having trouble lining up content

A link to your site would be helpful, as per WordPress Codex > Forum Welcome > Include as Much Information as Possible

https://www.fighttolearn.com/our-2015-2016-sponsors/ This is the link to the page in question.

https://www.fighttolearn.com/our-2015-2016-sponsors/ This is the link to the page in question.

I reviewed your site on Firefox, Chrome, I.E., and Opera browsers, and the text looks the same on all of them – centered, under the slider.

Is it this text (I can’t center it on the forum):

We like to thank our 2015-2016 sponsors.
Contact us to become a sponsor and join our prestigious list of caring companies and individuals.

Sponsoring a child is a great way to give back and help children in the at risk communities we currently serve.

If you are using the visual editor, it is default styled differently than any theme.

It is the list of sponsors. At the end the last ones do not line up on all the browsers and the companies logos will not line up either, they are at the end of the content.

For all your spansors, including the images at the bottom, you should be using a List. See this example: https://www.w3schools.com/html/tryit.asp?filename=tryhtml_lists_unordered

The <ul> </ul> wraps the entire list (this is an unordered list).
The <li> </li> is the individual items in the list.
The list can be styled in your theme’s CSS (style.css).

These “ul” and “li” tags are in the Text/Visual Editor in the top bar above the text area (where you write the text for the page).