Finding the Third Proportional to 12,684 and 20,238

Step by Step Solution

1. Step 1: Write the proportion equation
   12,684 : 20,238 = 20,238 : x
2. Step 2: Convert to fraction form
   12,684/20,238 = 20,238/x
3. Step 3: Cross multiply
   12,684x = 20,238 × 20,238
4. Step 4: Simplify right side
   12,684x = 409,576,644
5. Step 5: Solve for x
   x = 409,576,644/12,684
6. Step 6: Final answer
   x = 32,290.81