Finding the Fourth Proportional to 71,490.42, 98,658.81 and 39,226.50

Step by Step Solution

1. Step 1: Write the proportion equation
   71,490.42 : 98,658.81 = 39,226.50 : x
2. Step 2: Convert to fraction form
   71,490.42/98,658.81 = 39,226.50/x
3. Step 3: Cross multiply
   71,490.42x = 98,658.81 × 39,226.50
4. Step 4: Simplify right side
   71,490.42x = 3,870,039,810.47
5. Step 5: Solve for x
   x = 3,870,039,810.47/71,490.42
6. Step 6: Final answer
   x = 54,133.68