Finding the Fourth Proportional to 17,721.98, 24,456.40 and 9,764.20

Step by Step Solution

1. Step 1: Write the proportion equation
   17,721.98 : 24,456.40 = 9,764.20 : x
2. Step 2: Convert to fraction form
   17,721.98/24,456.40 = 9,764.20/x
3. Step 3: Cross multiply
   17,721.98x = 24,456.40 × 9,764.20
4. Step 4: Simplify right side
   17,721.98x = 238,797,187.04
5. Step 5: Solve for x
   x = 238,797,187.04/17,721.98
6. Step 6: Final answer
   x = 13,474.63