Answer:
-105.3,729,-2843.1
Step-by-step explanation:
so I ruled out addition and subtraction cause it's not decreasing or increasing regularly
so I considered division and multiplication
where I did the latter over the former
3.9/1= -39/10 and 27/-3.9=-90/13
so I used the two to form an alternating pattern
27×{-39/10}= -105.3
-105.3×{-90/13}= 729
729×{-39/10}= -2843.1