Finding the Fourth Proportional to 12,322.28, 17,006.72 and 9,689.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,322.28 : 17,006.72 = 9,689.68 : x
2. Step 2: Convert to fraction form
   12,322.28/17,006.72 = 9,689.68/x
3. Step 3: Cross multiply
   12,322.28x = 17,006.72 × 9,689.68
4. Step 4: Simplify right side
   12,322.28x = 164,789,674.65
5. Step 5: Solve for x
   x = 164,789,674.65/12,322.28
6. Step 6: Final answer
   x = 13,373.31