Finding the Fourth Proportional to 17,721.96, 24,456.42 and 11,426.28

Step by Step Solution

1. Step 1: Write the proportion equation
   17,721.96 : 24,456.42 = 11,426.28 : x
2. Step 2: Convert to fraction form
   17,721.96/24,456.42 = 11,426.28/x
3. Step 3: Cross multiply
   17,721.96x = 24,456.42 × 11,426.28
4. Step 4: Simplify right side
   17,721.96x = 279,445,902.72
5. Step 5: Solve for x
   x = 279,445,902.72/17,721.96
6. Step 6: Final answer
   x = 15,768.34