Finding the Fourth Proportional to 8,411.28, 12,614.76 and 5,123.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,411.28 : 12,614.76 = 5,123.76 : x
2. Step 2: Convert to fraction form
   8,411.28/12,614.76 = 5,123.76/x
3. Step 3: Cross multiply
   8,411.28x = 12,614.76 × 5,123.76
4. Step 4: Simplify right side
   8,411.28x = 64,635,002.70
5. Step 5: Solve for x
   x = 64,635,002.70/8,411.28
6. Step 6: Final answer
   x = 7,684.32