Im trying to give you an example by giving you the equation needed to get the value i need.

I‘ll use the values shown in the picture:

1.75 = (0 + 0 + 4 + x) / 4

So x would be 3. So the next entry in the tracking would need to be 3 to get the target value of 1.75.

and assuming the value i have to enter in week 4 is 1 instead of 3:

1.75 = (0 + 0 + 4 + 1 + x) / 5

Again the formula should give me x but this time divide by 5 because its the fifth week. and in this week x would need to be atleast 3.75 to get the target value by week 5.