Finding the Fourth Proportional to 17,679.38, 24,397.32 and 9,721.12

Step by Step Solution

1. Step 1: Write the proportion equation
   17,679.38 : 24,397.32 = 9,721.12 : x
2. Step 2: Convert to fraction form
   17,679.38/24,397.32 = 9,721.12/x
3. Step 3: Cross multiply
   17,679.38x = 24,397.32 × 9,721.12
4. Step 4: Simplify right side
   17,679.38x = 237,169,275.40
5. Step 5: Solve for x
   x = 237,169,275.40/17,679.38
6. Step 6: Final answer
   x = 13,415.02