Finding the Fourth Proportional to 12,538.28, 17,296.56 and 9,724.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,538.28 : 17,296.56 = 9,724.28 : x
2. Step 2: Convert to fraction form
   12,538.28/17,296.56 = 9,724.28/x
3. Step 3: Cross multiply
   12,538.28x = 17,296.56 × 9,724.28
4. Step 4: Simplify right side
   12,538.28x = 168,196,592.48
5. Step 5: Solve for x
   x = 168,196,592.48/12,538.28
6. Step 6: Final answer
   x = 13,414.65