Finding the Fourth Proportional to 71,735.72, 98,995.62 and 39,905

Step by Step Solution

1. Step 1: Write the proportion equation
   71,735.72 : 98,995.62 = 39,905 : x
2. Step 2: Convert to fraction form
   71,735.72/98,995.62 = 39,905/x
3. Step 3: Cross multiply
   71,735.72x = 98,995.62 × 39,905
4. Step 4: Simplify right side
   71,735.72x = 3,950,420,216.10
5. Step 5: Solve for x
   x = 3,950,420,216.10/71,735.72
6. Step 6: Final answer
   x = 55,069.08