Finding the Fourth Proportional to 10,440.89, 14,407.63 and 5,725.17

Step by Step Solution

1. Step 1: Write the proportion equation
   10,440.89 : 14,407.63 = 5,725.17 : x
2. Step 2: Convert to fraction form
   10,440.89/14,407.63 = 5,725.17/x
3. Step 3: Cross multiply
   10,440.89x = 14,407.63 × 5,725.17
4. Step 4: Simplify right side
   10,440.89x = 82,486,131.05
5. Step 5: Solve for x
   x = 82,486,131.05/10,440.89
6. Step 6: Final answer
   x = 7,900.30