Finding the Fourth Proportional to 8,343.92, 12,456.10 and 7,760.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,343.92 : 12,456.10 = 7,760.72 : x
2. Step 2: Convert to fraction form
   8,343.92/12,456.10 = 7,760.72/x
3. Step 3: Cross multiply
   8,343.92x = 12,456.10 × 7,760.72
4. Step 4: Simplify right side
   8,343.92x = 96,668,304.39
5. Step 5: Solve for x
   x = 96,668,304.39/8,343.92
6. Step 6: Final answer
   x = 11,585.48