Finding the Fourth Proportional to 72,367.68, 99,864.48 and 42,153.92

Step by Step Solution

1. Step 1: Write the proportion equation
   72,367.68 : 99,864.48 = 42,153.92 : x
2. Step 2: Convert to fraction form
   72,367.68/99,864.48 = 42,153.92/x
3. Step 3: Cross multiply
   72,367.68x = 99,864.48 × 42,153.92
4. Step 4: Simplify right side
   72,367.68x = 4,209,679,300.76
5. Step 5: Solve for x
   x = 4,209,679,300.76/72,367.68
6. Step 6: Final answer
   x = 58,170.71