Finding the Fourth Proportional to 57,111.16, 78,812.16 and 31,616.04

Step by Step Solution

1. Step 1: Write the proportion equation
   57,111.16 : 78,812.16 = 31,616.04 : x
2. Step 2: Convert to fraction form
   57,111.16/78,812.16 = 31,616.04/x
3. Step 3: Cross multiply
   57,111.16x = 78,812.16 × 31,616.04
4. Step 4: Simplify right side
   57,111.16x = 2,491,728,403.05
5. Step 5: Solve for x
   x = 2,491,728,403.05/57,111.16
6. Step 6: Final answer
   x = 43,629.45