Finding the Fourth Proportional to 71,839, 99,130.72 and 40,010.86

Step by Step Solution

1. Step 1: Write the proportion equation
   71,839 : 99,130.72 = 40,010.86 : x
2. Step 2: Convert to fraction form
   71,839/99,130.72 = 40,010.86/x
3. Step 3: Cross multiply
   71,839x = 99,130.72 × 40,010.86
4. Step 4: Simplify right side
   71,839x = 3,966,305,359.62
5. Step 5: Solve for x
   x = 3,966,305,359.62/71,839
6. Step 6: Final answer
   x = 55,211.03