Multi-volume (Split) Archive. The ".part04" suffix indicates it is not a standalone file but a piece of a sequence.
The file is the fourth segment of a larger multi-volume RAR archive. Such archives are created by splitting one or more large files into smaller parts for easier storage, sharing, or downloading. File Identity and Characteristics sc23792-CTAGOHOv10260.part04.rar
Split RAR files - what they look like and how they work with WinZip Multi-volume (Split) Archive