Finding the Fourth Proportional to 71,507.72, 98,679.39 and 39,676.07

Step by Step Solution

1. Step 1: Write the proportion equation
   71,507.72 : 98,679.39 = 39,676.07 : x
2. Step 2: Convert to fraction form
   71,507.72/98,679.39 = 39,676.07/x
3. Step 3: Cross multiply
   71,507.72x = 98,679.39 × 39,676.07
4. Step 4: Simplify right side
   71,507.72x = 3,915,210,385.20
5. Step 5: Solve for x
   x = 3,915,210,385.20/71,507.72
6. Step 6: Final answer
   x = 54,752.28