Finding the Third Proportional to 12,618 and 20,020

Step by Step Solution

1. Step 1: Write the proportion equation
   12,618 : 20,020 = 20,020 : x
2. Step 2: Convert to fraction form
   12,618/20,020 = 20,020/x
3. Step 3: Cross multiply
   12,618x = 20,020 × 20,020
4. Step 4: Simplify right side
   12,618x = 400,800,400
5. Step 5: Solve for x
   x = 400,800,400/12,618
6. Step 6: Final answer
   x = 31,764.18