3D/CAD models are commonly exported in a 3D version a PDF document, which means xprt to pdf conversion is most likely possible.
Such conversion creates 3D rotatable window inside one of the PDF document pages which will contain the model imported from the original CAD file, in this case .xpr part file from PTC Pro/Engineer. Modern programs offer this PDF export function by default, but you can also find dedicated converters for this purpose.