Finding the Third Proportional to 9,723 and 20,418

Step by Step Solution

1. Step 1: Write the proportion equation
   9,723 : 20,418 = 20,418 : x
2. Step 2: Convert to fraction form
   9,723/20,418 = 20,418/x
3. Step 3: Cross multiply
   9,723x = 20,418 × 20,418
4. Step 4: Simplify right side
   9,723x = 416,894,724
5. Step 5: Solve for x
   x = 416,894,724/9,723
6. Step 6: Final answer
   x = 42,877.17