Finding the Third Proportional to 8,909.53 and 12,456.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,909.53 : 12,456.05 = 12,456.05 : x
2. Step 2: Convert to fraction form
   8,909.53/12,456.05 = 12,456.05/x
3. Step 3: Cross multiply
   8,909.53x = 12,456.05 × 12,456.05
4. Step 4: Simplify right side
   8,909.53x = 155,153,249.72
5. Step 5: Solve for x
   x = 155,153,249.72/8,909.53
6. Step 6: Final answer
   x = 17,414.31