Finding the Fourth Proportional to 16,479.12, 22,742.78 and 9,406.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,479.12 : 22,742.78 = 9,406.60 : x
2. Step 2: Convert to fraction form
   16,479.12/22,742.78 = 9,406.60/x
3. Step 3: Cross multiply
   16,479.12x = 22,742.78 × 9,406.60
4. Step 4: Simplify right side
   16,479.12x = 213,932,234.35
5. Step 5: Solve for x
   x = 213,932,234.35/16,479.12
6. Step 6: Final answer
   x = 12,982.02