Finding the Fourth Proportional to 7,456.72, 10,280.12 and 5,631.76

Step by Step Solution

1. Step 1: Write the proportion equation
   7,456.72 : 10,280.12 = 5,631.76 : x
2. Step 2: Convert to fraction form
   7,456.72/10,280.12 = 5,631.76/x
3. Step 3: Cross multiply
   7,456.72x = 10,280.12 × 5,631.76
4. Step 4: Simplify right side
   7,456.72x = 57,895,168.61
5. Step 5: Solve for x
   x = 57,895,168.61/7,456.72
6. Step 6: Final answer
   x = 7,764.16