Finding the Fourth Proportional to 17,686.72, 24,401.40 and 10,965.40

Step by Step Solution

1. Step 1: Write the proportion equation
   17,686.72 : 24,401.40 = 10,965.40 : x
2. Step 2: Convert to fraction form
   17,686.72/24,401.40 = 10,965.40/x
3. Step 3: Cross multiply
   17,686.72x = 24,401.40 × 10,965.40
4. Step 4: Simplify right side
   17,686.72x = 267,571,111.56
5. Step 5: Solve for x
   x = 267,571,111.56/17,686.72
6. Step 6: Final answer
   x = 15,128.36