Finding the Fourth Proportional to 71,677.92, 98,918.06 and 39,415

Step by Step Solution

1. Step 1: Write the proportion equation
   71,677.92 : 98,918.06 = 39,415 : x
2. Step 2: Convert to fraction form
   71,677.92/98,918.06 = 39,415/x
3. Step 3: Cross multiply
   71,677.92x = 98,918.06 × 39,415
4. Step 4: Simplify right side
   71,677.92x = 3,898,855,334.90
5. Step 5: Solve for x
   x = 3,898,855,334.90/71,677.92
6. Step 6: Final answer
   x = 54,394.09