Finding the Fourth Proportional to 17,678.62, 24,396.42 and 9,721.27

Step by Step Solution

1. Step 1: Write the proportion equation
   17,678.62 : 24,396.42 = 9,721.27 : x
2. Step 2: Convert to fraction form
   17,678.62/24,396.42 = 9,721.27/x
3. Step 3: Cross multiply
   17,678.62x = 24,396.42 × 9,721.27
4. Step 4: Simplify right side
   17,678.62x = 237,164,185.85
5. Step 5: Solve for x
   x = 237,164,185.85/17,678.62
6. Step 6: Final answer
   x = 13,415.31