Finding the Fourth Proportional to 10,440.76, 14,407.50 and 5,724.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,440.76 : 14,407.50 = 5,724.28 : x
2. Step 2: Convert to fraction form
   10,440.76/14,407.50 = 5,724.28/x
3. Step 3: Cross multiply
   10,440.76x = 14,407.50 × 5,724.28
4. Step 4: Simplify right side
   10,440.76x = 82,472,564.10
5. Step 5: Solve for x
   x = 82,472,564.10/10,440.76
6. Step 6: Final answer
   x = 7,899.10