Finding the Fourth Proportional to 17,478.78, 24,120.98 and 9,521.00

Step by Step Solution

1. Step 1: Write the proportion equation
   17,478.78 : 24,120.98 = 9,521.00 : x
2. Step 2: Convert to fraction form
   17,478.78/24,120.98 = 9,521.00/x
3. Step 3: Cross multiply
   17,478.78x = 24,120.98 × 9,521.00
4. Step 4: Simplify right side
   17,478.78x = 229,655,682.37
5. Step 5: Solve for x
   x = 229,655,682.37/17,478.78
6. Step 6: Final answer
   x = 13,139.11