Finding the Fourth Proportional to 17,359.24, 25,943.60 and 12,689.08

Step by Step Solution

1. Step 1: Write the proportion equation
   17,359.24 : 25,943.60 = 12,689.08 : x
2. Step 2: Convert to fraction form
   17,359.24/25,943.60 = 12,689.08/x
3. Step 3: Cross multiply
   17,359.24x = 25,943.60 × 12,689.08
4. Step 4: Simplify right side
   17,359.24x = 329,200,415.89
5. Step 5: Solve for x
   x = 329,200,415.89/17,359.24
6. Step 6: Final answer
   x = 18,963.99