Finding the Third Proportional to 8,454 and 12,441.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,454 : 12,441.50 = 12,441.50 : x
2. Step 2: Convert to fraction form
   8,454/12,441.50 = 12,441.50/x
3. Step 3: Cross multiply
   8,454x = 12,441.50 × 12,441.50
4. Step 4: Simplify right side
   8,454x = 154,790,922.25
5. Step 5: Solve for x
   x = 154,790,922.25/8,454
6. Step 6: Final answer
   x = 18,309.78