Finding the Fourth Proportional to 10,440.88, 14,408.76 and 5,725.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,440.88 : 14,408.76 = 5,725.12 : x
2. Step 2: Convert to fraction form
   10,440.88/14,408.76 = 5,725.12/x
3. Step 3: Cross multiply
   10,440.88x = 14,408.76 × 5,725.12
4. Step 4: Simplify right side
   10,440.88x = 82,491,880.05
5. Step 5: Solve for x
   x = 82,491,880.05/10,440.88
6. Step 6: Final answer
   x = 7,900.86