Finding the Third Proportional to 11,717 and 21,706

Step by Step Solution

1. Step 1: Write the proportion equation
   11,717 : 21,706 = 21,706 : x
2. Step 2: Convert to fraction form
   11,717/21,706 = 21,706/x
3. Step 3: Cross multiply
   11,717x = 21,706 × 21,706
4. Step 4: Simplify right side
   11,717x = 471,150,436
5. Step 5: Solve for x
   x = 471,150,436/11,717
6. Step 6: Final answer
   x = 40,210.84