Finding the Fourth Proportional to 71,057.98, 98,061.81 and 40,429.40

Step by Step Solution

1. Step 1: Write the proportion equation
   71,057.98 : 98,061.81 = 40,429.40 : x
2. Step 2: Convert to fraction form
   71,057.98/98,061.81 = 40,429.40/x
3. Step 3: Cross multiply
   71,057.98x = 98,061.81 × 40,429.40
4. Step 4: Simplify right side
   71,057.98x = 3,964,579,499.29
5. Step 5: Solve for x
   x = 3,964,579,499.29/71,057.98
6. Step 6: Final answer
   x = 55,793.59