Finding the Third Proportional to 17,909 and 20,705

Step by Step Solution

1. Step 1: Write the proportion equation
   17,909 : 20,705 = 20,705 : x
2. Step 2: Convert to fraction form
   17,909/20,705 = 20,705/x
3. Step 3: Cross multiply
   17,909x = 20,705 × 20,705
4. Step 4: Simplify right side
   17,909x = 428,697,025
5. Step 5: Solve for x
   x = 428,697,025/17,909
6. Step 6: Final answer
   x = 23,937.52