Finding the Fourth Proportional to 71,829.30, 99,127.98 and 39,997.53

Step by Step Solution

1. Step 1: Write the proportion equation
   71,829.30 : 99,127.98 = 39,997.53 : x
2. Step 2: Convert to fraction form
   71,829.30/99,127.98 = 39,997.53/x
3. Step 3: Cross multiply
   71,829.30x = 99,127.98 × 39,997.53
4. Step 4: Simplify right side
   71,829.30x = 3,964,874,353.89
5. Step 5: Solve for x
   x = 3,964,874,353.89/71,829.30
6. Step 6: Final answer
   x = 55,198.57