Finding the Third Proportional to 8,418.50 and 12,464.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,418.50 : 12,464.50 = 12,464.50 : x
2. Step 2: Convert to fraction form
   8,418.50/12,464.50 = 12,464.50/x
3. Step 3: Cross multiply
   8,418.50x = 12,464.50 × 12,464.50
4. Step 4: Simplify right side
   8,418.50x = 155,363,760.25
5. Step 5: Solve for x
   x = 155,363,760.25/8,418.50
6. Step 6: Final answer
   x = 18,455.04