Finding the Fourth Proportional to 82,160.60, 123,239.61 and 42,156.50

Step by Step Solution

1. Step 1: Write the proportion equation
   82,160.60 : 123,239.61 = 42,156.50 : x
2. Step 2: Convert to fraction form
   82,160.60/123,239.61 = 42,156.50/x
3. Step 3: Cross multiply
   82,160.60x = 123,239.61 × 42,156.50
4. Step 4: Simplify right side
   82,160.60x = 5,195,350,002.77
5. Step 5: Solve for x
   x = 5,195,350,002.77/82,160.60
6. Step 6: Final answer
   x = 63,234.08