Finding the Fourth Proportional to 71,799.64, 99,081.18 and 39,967.48

Step by Step Solution

1. Step 1: Write the proportion equation
   71,799.64 : 99,081.18 = 39,967.48 : x
2. Step 2: Convert to fraction form
   71,799.64/99,081.18 = 39,967.48/x
3. Step 3: Cross multiply
   71,799.64x = 99,081.18 × 39,967.48
4. Step 4: Simplify right side
   71,799.64x = 3,960,025,080.03
5. Step 5: Solve for x
   x = 3,960,025,080.03/71,799.64
6. Step 6: Final answer
   x = 55,153.83