Finding the Fourth Proportional to 87,499.24, 131,250.88 and 31,343.20

Step by Step Solution

1. Step 1: Write the proportion equation
   87,499.24 : 131,250.88 = 31,343.20 : x
2. Step 2: Convert to fraction form
   87,499.24/131,250.88 = 31,343.20/x
3. Step 3: Cross multiply
   87,499.24x = 131,250.88 × 31,343.20
4. Step 4: Simplify right side
   87,499.24x = 4,113,822,582.02
5. Step 5: Solve for x
   x = 4,113,822,582.02/87,499.24
6. Step 6: Final answer
   x = 47,015.52