Finding the Fourth Proportional to 71,974.31, 99,326.61 and 40,145.27

Step by Step Solution

1. Step 1: Write the proportion equation
   71,974.31 : 99,326.61 = 40,145.27 : x
2. Step 2: Convert to fraction form
   71,974.31/99,326.61 = 40,145.27/x
3. Step 3: Cross multiply
   71,974.31x = 99,326.61 × 40,145.27
4. Step 4: Simplify right side
   71,974.31x = 3,987,493,080.00
5. Step 5: Solve for x
   x = 3,987,493,080.00/71,974.31
6. Step 6: Final answer
   x = 55,401.62