Finding the Third Proportional to 7,980 and 12,249

Step by Step Solution

1. Step 1: Write the proportion equation
   7,980 : 12,249 = 12,249 : x
2. Step 2: Convert to fraction form
   7,980/12,249 = 12,249/x
3. Step 3: Cross multiply
   7,980x = 12,249 × 12,249
4. Step 4: Simplify right side
   7,980x = 150,038,001
5. Step 5: Solve for x
   x = 150,038,001/7,980
6. Step 6: Final answer
   x = 18,801.75