Finding the Fourth Proportional to 72,358.96, 99,854.49 and 42,149.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,358.96 : 99,854.49 = 42,149.20 : x
2. Step 2: Convert to fraction form
   72,358.96/99,854.49 = 42,149.20/x
3. Step 3: Cross multiply
   72,358.96x = 99,854.49 × 42,149.20
4. Step 4: Simplify right side
   72,358.96x = 4,208,786,869.91
5. Step 5: Solve for x
   x = 4,208,786,869.91/72,358.96
6. Step 6: Final answer
   x = 58,165.39