Finding the Fourth Proportional to 72,002.08, 99,367.86 and 40,177.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,002.08 : 99,367.86 = 40,177.18 : x
2. Step 2: Convert to fraction form
   72,002.08/99,367.86 = 40,177.18/x
3. Step 3: Cross multiply
   72,002.08x = 99,367.86 × 40,177.18
4. Step 4: Simplify right side
   72,002.08x = 3,992,320,397.43
5. Step 5: Solve for x
   x = 3,992,320,397.43/72,002.08
6. Step 6: Final answer
   x = 55,447.29