Inertia

No.14296563 ViewReplyOriginalReport
If the origin of inertia is gravitational interaction with the distant universe, but gravity propagates at c, how is the reaction force instant?
>https://www.researchgate.net/publication/267438719_Study_on_Inertia_as_a_Gravity_Induced_Property_of_Mass_in_an_Infinite_Hubble_Expanding_Universe