Finding the Fourth Proportional to 17,957.24, 24,780.56 and 9,999.30

Step by Step Solution

1. Step 1: Write the proportion equation
   17,957.24 : 24,780.56 = 9,999.30 : x
2. Step 2: Convert to fraction form
   17,957.24/24,780.56 = 9,999.30/x
3. Step 3: Cross multiply
   17,957.24x = 24,780.56 × 9,999.30
4. Step 4: Simplify right side
   17,957.24x = 247,788,253.61
5. Step 5: Solve for x
   x = 247,788,253.61/17,957.24
6. Step 6: Final answer
   x = 13,798.79