Finding the Fourth Proportional to 72,355.87, 99,854.18 and 42,136.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72,355.87 : 99,854.18 = 42,136.32 : x
2. Step 2: Convert to fraction form
   72,355.87/99,854.18 = 42,136.32/x
3. Step 3: Cross multiply
   72,355.87x = 99,854.18 × 42,136.32
4. Step 4: Simplify right side
   72,355.87x = 4,207,487,471.14
5. Step 5: Solve for x
   x = 4,207,487,471.14/72,355.87
6. Step 6: Final answer
   x = 58,149.91