Finding the Fourth Proportional to 16,231.76, 22,399.69 and 8,779.76

Step by Step Solution

1. Step 1: Write the proportion equation
   16,231.76 : 22,399.69 = 8,779.76 : x
2. Step 2: Convert to fraction form
   16,231.76/22,399.69 = 8,779.76/x
3. Step 3: Cross multiply
   16,231.76x = 22,399.69 × 8,779.76
4. Step 4: Simplify right side
   16,231.76x = 196,663,902.27
5. Step 5: Solve for x
   x = 196,663,902.27/16,231.76
6. Step 6: Final answer
   x = 12,115.99