Form API Submit Button for Multiple Forms I created a module with 3 forms on it. Is there a way to only have one submit button at the very bottom of the page that will store all three values?
Not really. Drupal form may try to redirect you after successful submit. If 3 forms try, which redirect should work? And that's only one example.

Create fourth form function. In it, call all 3 existing ones, clean up mess with submit functions, validators and redirects, and it should work. Or simply merge your forms into one, why you needed three?