Center align Dynamic Images

I am trying to have dynamically loaded images on the single post page of a template center align, but am having trouble since they aren’t always the same width. You can view a post page of the site at

https://www.leapfrogwebmarketing.com/clients/creative_expression/?p=185

Would I have to use jQuery to get the width of the image, then add that information to specific css selector? If anyone knows a simple way to solve this issue, it would be greatly appreciated!

Thanks!