Finding the Fourth Proportional to 72,418.92, 108,658.38 and 39,099.83

Step by Step Solution

1. Step 1: Write the proportion equation
   72,418.92 : 108,658.38 = 39,099.83 : x
2. Step 2: Convert to fraction form
   72,418.92/108,658.38 = 39,099.83/x
3. Step 3: Cross multiply
   72,418.92x = 108,658.38 × 39,099.83
4. Step 4: Simplify right side
   72,418.92x = 4,248,523,642.78
5. Step 5: Solve for x
   x = 4,248,523,642.78/72,418.92
6. Step 6: Final answer
   x = 58,665.93