Finding the Third Proportional to 8,260 and 12,398

Step by Step Solution

1. Step 1: Write the proportion equation
   8,260 : 12,398 = 12,398 : x
2. Step 2: Convert to fraction form
   8,260/12,398 = 12,398/x
3. Step 3: Cross multiply
   8,260x = 12,398 × 12,398
4. Step 4: Simplify right side
   8,260x = 153,710,404
5. Step 5: Solve for x
   x = 153,710,404/8,260
6. Step 6: Final answer
   x = 18,609.01