Finding the Third Proportional to 8,978 and 12,225

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978 : 12,225 = 12,225 : x
2. Step 2: Convert to fraction form
   8,978/12,225 = 12,225/x
3. Step 3: Cross multiply
   8,978x = 12,225 × 12,225
4. Step 4: Simplify right side
   8,978x = 149,450,625
5. Step 5: Solve for x
   x = 149,450,625/8,978
6. Step 6: Final answer
   x = 16,646.32