Finding the Fourth Proportional to 16,612.38, 24,879.69 and 12,456.54

Step by Step Solution

1. Step 1: Write the proportion equation
   16,612.38 : 24,879.69 = 12,456.54 : x
2. Step 2: Convert to fraction form
   16,612.38/24,879.69 = 12,456.54/x
3. Step 3: Cross multiply
   16,612.38x = 24,879.69 × 12,456.54
4. Step 4: Simplify right side
   16,612.38x = 309,914,853.67
5. Step 5: Solve for x
   x = 309,914,853.67/16,612.38
6. Step 6: Final answer
   x = 18,655.66