Finding the Fourth Proportional to 10,440.88, 14,408.40 and 5,725.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,440.88 : 14,408.40 = 5,725.16 : x
2. Step 2: Convert to fraction form
   10,440.88/14,408.40 = 5,725.16/x
3. Step 3: Cross multiply
   10,440.88x = 14,408.40 × 5,725.16
4. Step 4: Simplify right side
   10,440.88x = 82,490,395.34
5. Step 5: Solve for x
   x = 82,490,395.34/10,440.88
6. Step 6: Final answer
   x = 7,900.71