Finding the Fourth Proportional to 78,691.55, 108,592.92 and 42,881.85

Step by Step Solution

1. Step 1: Write the proportion equation
   78,691.55 : 108,592.92 = 42,881.85 : x
2. Step 2: Convert to fraction form
   78,691.55/108,592.92 = 42,881.85/x
3. Step 3: Cross multiply
   78,691.55x = 108,592.92 × 42,881.85
4. Step 4: Simplify right side
   78,691.55x = 4,656,665,306.50
5. Step 5: Solve for x
   x = 4,656,665,306.50/78,691.55
6. Step 6: Final answer
   x = 59,176.18