What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Unfortunately we can not assist you with this since we are not connected to StudioPress - Prose Theme developers, but you should be able to contact them about this if you have purchased the theme from them.
I see that they even have forum for this: http://www.studiopress.com/forums/
They would know exactly what you should do to embed the jotform, while we can provide you with the code to do it.
I would recommend using the iframe embed code: How to get the jotform iFrame Code
When you ask on their forum, you can tell them that the code is based on the iframe and script part and if needed, you can remove everything after <script> tag so that you only have iframe code ending with </iframe>.
Hope this helps, but if you have any questions, feel free to ask.