Hi joelfariss,
After you have downloaded the zip file from Themeforest, unzip the folder and inside it you can see another zip file named propulsion.zip, unzip this file and find the propulsion folder. Open it, and you should see two folders, named _MACOSX and propulsion. Use the propulsion folder (inside the propulsion folder) and upload it to your site via ftp. You should upload it to this folder: wp-content > themes. Hope this helps. :)
Or try to check this demo on how to properly install the theme: http://www.kriesi.at/themes/corona/templates/video-tutorials/#auto-install
The title of the video is:
Corona Theme Demo 1:
Installation and using the auto importer
The demo is using a different theme but the implementation is still the same, just follow the demo, and everything should be alright. :)
Regards,
Ismael