Finding the Fourth Proportional to 10,440.72, 14,408.28 and 5,724.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,440.72 : 14,408.28 = 5,724.72 : x
2. Step 2: Convert to fraction form
   10,440.72/14,408.28 = 5,724.72/x
3. Step 3: Cross multiply
   10,440.72x = 14,408.28 × 5,724.72
4. Step 4: Simplify right side
   10,440.72x = 82,483,368.68
5. Step 5: Solve for x
   x = 82,483,368.68/10,440.72
6. Step 6: Final answer
   x = 7,900.16