Finding the Fourth Proportional to 16,280.32, 24,388.48 and 8,478.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,280.32 : 24,388.48 = 8,478.72 : x
2. Step 2: Convert to fraction form
   16,280.32/24,388.48 = 8,478.72/x
3. Step 3: Cross multiply
   16,280.32x = 24,388.48 × 8,478.72
4. Step 4: Simplify right side
   16,280.32x = 206,783,093.15
5. Step 5: Solve for x
   x = 206,783,093.15/16,280.32
6. Step 6: Final answer
   x = 12,701.41