Finding the Fourth Proportional to 17,176.72, 23,702.28 and 9,724.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,176.72 : 23,702.28 = 9,724.72 : x
2. Step 2: Convert to fraction form
   17,176.72/23,702.28 = 9,724.72/x
3. Step 3: Cross multiply
   17,176.72x = 23,702.28 × 9,724.72
4. Step 4: Simplify right side
   17,176.72x = 230,498,036.36
5. Step 5: Solve for x
   x = 230,498,036.36/17,176.72
6. Step 6: Final answer
   x = 13,419.21