Finding the Fourth Proportional to 66,411.16, 99,762.72 and 40,131.52

Step by Step Solution

1. Step 1: Write the proportion equation
   66,411.16 : 99,762.72 = 40,131.52 : x
2. Step 2: Convert to fraction form
   66,411.16/99,762.72 = 40,131.52/x
3. Step 3: Cross multiply
   66,411.16x = 99,762.72 × 40,131.52
4. Step 4: Simplify right side
   66,411.16x = 4,003,629,592.93
5. Step 5: Solve for x
   x = 4,003,629,592.93/66,411.16
6. Step 6: Final answer
   x = 60,285.49