Finding the Fourth Proportional to 71,688.35, 98,927.33 and 39,422.69

Step by Step Solution

1. Step 1: Write the proportion equation
   71,688.35 : 98,927.33 = 39,422.69 : x
2. Step 2: Convert to fraction form
   71,688.35/98,927.33 = 39,422.69/x
3. Step 3: Cross multiply
   71,688.35x = 98,927.33 × 39,422.69
4. Step 4: Simplify right side
   71,688.35x = 3,899,981,878.72
5. Step 5: Solve for x
   x = 3,899,981,878.72/71,688.35
6. Step 6: Final answer
   x = 54,401.89