Finding the Third Proportional to 8,212 and 12,450

Step by Step Solution

1. Step 1: Write the proportion equation
   8,212 : 12,450 = 12,450 : x
2. Step 2: Convert to fraction form
   8,212/12,450 = 12,450/x
3. Step 3: Cross multiply
   8,212x = 12,450 × 12,450
4. Step 4: Simplify right side
   8,212x = 155,002,500
5. Step 5: Solve for x
   x = 155,002,500/8,212
6. Step 6: Final answer
   x = 18,875.12