Finding the Third Proportional to 12,957 and 20,666

Step by Step Solution

1. Step 1: Write the proportion equation
   12,957 : 20,666 = 20,666 : x
2. Step 2: Convert to fraction form
   12,957/20,666 = 20,666/x
3. Step 3: Cross multiply
   12,957x = 20,666 × 20,666
4. Step 4: Simplify right side
   12,957x = 427,083,556
5. Step 5: Solve for x
   x = 427,083,556/12,957
6. Step 6: Final answer
   x = 32,961.61