For discussion(s) of Rich Media and 3D visit:
https://forums.adobe.com/community/acrobat/acrobat_3d_features
Summarizing some of the information Dave Merchant has placed there:
Acrobat can only import PRC or U3D files.
Use 3rd party tools (i.e., Tetra4D) to convert to one of these formats.
Embedded PRC or U3D 3D models are supported by Acrobat and Adobe Reader.
This support is limited to desktop operating systems.
To date the has been no support on mobile operating systems.
Acrobat 9 Pro Extended was the last version of Acrobat to have a file converter tool to translate 3D models into U3D. The Acrobat 9 product family entered End of Support June 2013 --- Adobe provides no support for installation or use of versions have entered End of Support.
As of Acrobat X, all 3D model translation is handled by commercial plugins
available from Adobe's official partner - http://www.tetra4d.com
Be well...