What is the next number in a sequence of:6189, 2158, 3107, 2104, ____

Question

It is not in AP, 2nd number is formed by 1st number ,3rd number is formed by 2nd number ,and so on

Answer 1

Hmm that's tricky 😬😅

I think this quest is based on mathematics and it's off topic for this platform

Answer 2

-7783?

Because if the given values belong to a 3rd degree function, so, that:
f(0) = 6189
f(1) = 2158
f(2) = 3107
f(3) = 2104

Then:
f(4) ≈ -7783