Finding the Fourth Proportional to 57,059.57, 78,736.15 and 31,561.90

Step by Step Solution

1. Step 1: Write the proportion equation
   57,059.57 : 78,736.15 = 31,561.90 : x
2. Step 2: Convert to fraction form
   57,059.57/78,736.15 = 31,561.90/x
3. Step 3: Cross multiply
   57,059.57x = 78,736.15 × 31,561.90
4. Step 4: Simplify right side
   57,059.57x = 2,485,062,492.69
5. Step 5: Solve for x
   x = 2,485,062,492.69/57,059.57
6. Step 6: Final answer
   x = 43,552.07