Finding the Fourth Proportional to 9,651.49, 14,542.12 and 8,728.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,651.49 : 14,542.12 = 8,728.09 : x
2. Step 2: Convert to fraction form
   9,651.49/14,542.12 = 8,728.09/x
3. Step 3: Cross multiply
   9,651.49x = 14,542.12 × 8,728.09
4. Step 4: Simplify right side
   9,651.49x = 126,924,932.15
5. Step 5: Solve for x
   x = 126,924,932.15/9,651.49
6. Step 6: Final answer
   x = 13,150.81