Finding the Fourth Proportional to 9,054.97, 13,581.60 and 3,131.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,054.97 : 13,581.60 = 3,131.31 : x
2. Step 2: Convert to fraction form
   9,054.97/13,581.60 = 3,131.31/x
3. Step 3: Cross multiply
   9,054.97x = 13,581.60 × 3,131.31
4. Step 4: Simplify right side
   9,054.97x = 42,528,199.90
5. Step 5: Solve for x
   x = 42,528,199.90/9,054.97
6. Step 6: Final answer
   x = 4,696.67