Finding the Fourth Proportional to 10,440.19, 14,407.45 and 5,724.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,440.19 : 14,407.45 = 5,724.55 : x
2. Step 2: Convert to fraction form
   10,440.19/14,407.45 = 5,724.55/x
3. Step 3: Cross multiply
   10,440.19x = 14,407.45 × 5,724.55
4. Step 4: Simplify right side
   10,440.19x = 82,476,167.90
5. Step 5: Solve for x
   x = 82,476,167.90/10,440.19
6. Step 6: Final answer
   x = 7,899.87