Finding the Third Proportional to 12,898 and 20,499

Step by Step Solution

1. Step 1: Write the proportion equation
   12,898 : 20,499 = 20,499 : x
2. Step 2: Convert to fraction form
   12,898/20,499 = 20,499/x
3. Step 3: Cross multiply
   12,898x = 20,499 × 20,499
4. Step 4: Simplify right side
   12,898x = 420,209,001
5. Step 5: Solve for x
   x = 420,209,001/12,898
6. Step 6: Final answer
   x = 32,579.39