Finding the Fourth Proportional to 71,676.72, 98,890.76 and 39,839.48

Step by Step Solution

1. Step 1: Write the proportion equation
   71,676.72 : 98,890.76 = 39,839.48 : x
2. Step 2: Convert to fraction form
   71,676.72/98,890.76 = 39,839.48/x
3. Step 3: Cross multiply
   71,676.72x = 98,890.76 × 39,839.48
4. Step 4: Simplify right side
   71,676.72x = 3,939,756,455.20
5. Step 5: Solve for x
   x = 3,939,756,455.20/71,676.72
6. Step 6: Final answer
   x = 54,965.64