Finding the Fourth Proportional to 72,168.75, 99,591.17 and 40,340.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,168.75 : 99,591.17 = 40,340.61 : x
2. Step 2: Convert to fraction form
   72,168.75/99,591.17 = 40,340.61/x
3. Step 3: Cross multiply
   72,168.75x = 99,591.17 × 40,340.61
4. Step 4: Simplify right side
   72,168.75x = 4,017,568,346.71
5. Step 5: Solve for x
   x = 4,017,568,346.71/72,168.75
6. Step 6: Final answer
   x = 55,669.09