Finding the Fourth Proportional to 57,153.38, 78,869.88 and 31,658.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,153.38 : 78,869.88 = 31,658.72 : x
2. Step 2: Convert to fraction form
   57,153.38/78,869.88 = 31,658.72/x
3. Step 3: Cross multiply
   57,153.38x = 78,869.88 × 31,658.72
4. Step 4: Simplify right side
   57,153.38x = 2,496,919,447.35
5. Step 5: Solve for x
   x = 2,496,919,447.35/57,153.38
6. Step 6: Final answer
   x = 43,688.05