Finding the Third Proportional to 8,306 and 12,521

Step by Step Solution

1. Step 1: Write the proportion equation
   8,306 : 12,521 = 12,521 : x
2. Step 2: Convert to fraction form
   8,306/12,521 = 12,521/x
3. Step 3: Cross multiply
   8,306x = 12,521 × 12,521
4. Step 4: Simplify right side
   8,306x = 156,775,441
5. Step 5: Solve for x
   x = 156,775,441/8,306
6. Step 6: Final answer
   x = 18,874.96