Finding the Fourth Proportional to 72,402.15, 99,910.87 and 42,192.39

Step by Step Solution

1. Step 1: Write the proportion equation
   72,402.15 : 99,910.87 = 42,192.39 : x
2. Step 2: Convert to fraction form
   72,402.15/99,910.87 = 42,192.39/x
3. Step 3: Cross multiply
   72,402.15x = 99,910.87 × 42,192.39
4. Step 4: Simplify right side
   72,402.15x = 4,215,478,661.46
5. Step 5: Solve for x
   x = 4,215,478,661.46/72,402.15
6. Step 6: Final answer
   x = 58,223.11