Finding the Fourth Proportional to 71,435.90, 98,581.38 and 39,603.98

Step by Step Solution

1. Step 1: Write the proportion equation
   71,435.90 : 98,581.38 = 39,603.98 : x
2. Step 2: Convert to fraction form
   71,435.90/98,581.38 = 39,603.98/x
3. Step 3: Cross multiply
   71,435.90x = 98,581.38 × 39,603.98
4. Step 4: Simplify right side
   71,435.90x = 3,904,215,001.89
5. Step 5: Solve for x
   x = 3,904,215,001.89/71,435.90
6. Step 6: Final answer
   x = 54,653.40