Finding the Third Proportional to 12,712 and 20,700

Step by Step Solution

1. Step 1: Write the proportion equation
   12,712 : 20,700 = 20,700 : x
2. Step 2: Convert to fraction form
   12,712/20,700 = 20,700/x
3. Step 3: Cross multiply
   12,712x = 20,700 × 20,700
4. Step 4: Simplify right side
   12,712x = 428,490,000
5. Step 5: Solve for x
   x = 428,490,000/12,712
6. Step 6: Final answer
   x = 33,707.52