Finding the Fourth Proportional to 17,678.69, 24,397.25 and 9,721.61

Step by Step Solution

1. Step 1: Write the proportion equation
   17,678.69 : 24,397.25 = 9,721.61 : x
2. Step 2: Convert to fraction form
   17,678.69/24,397.25 = 9,721.61/x
3. Step 3: Cross multiply
   17,678.69x = 24,397.25 × 9,721.61
4. Step 4: Simplify right side
   17,678.69x = 237,180,500.96
5. Step 5: Solve for x
   x = 237,180,500.96/17,678.69
6. Step 6: Final answer
   x = 13,416.18