Finding the Fourth Proportional to 16,231.08, 22,399.18 and 9,521.54

Step by Step Solution

1. Step 1: Write the proportion equation
   16,231.08 : 22,399.18 = 9,521.54 : x
2. Step 2: Convert to fraction form
   16,231.08/22,399.18 = 9,521.54/x
3. Step 3: Cross multiply
   16,231.08x = 22,399.18 × 9,521.54
4. Step 4: Simplify right side
   16,231.08x = 213,274,688.34
5. Step 5: Solve for x
   x = 213,274,688.34/16,231.08
6. Step 6: Final answer
   x = 13,139.90