Finding the Fourth Proportional to 71,963.76, 99,310.52 and 40,134.72

Step by Step Solution

1. Step 1: Write the proportion equation
   71,963.76 : 99,310.52 = 40,134.72 : x
2. Step 2: Convert to fraction form
   71,963.76/99,310.52 = 40,134.72/x
3. Step 3: Cross multiply
   71,963.76x = 99,310.52 × 40,134.72
4. Step 4: Simplify right side
   71,963.76x = 3,985,799,913.25
5. Step 5: Solve for x
   x = 3,985,799,913.25/71,963.76
6. Step 6: Final answer
   x = 55,386.21