Finding the Third Proportional to 20,418 and 30,605

Step by Step Solution

1. Step 1: Write the proportion equation
   20,418 : 30,605 = 30,605 : x
2. Step 2: Convert to fraction form
   20,418/30,605 = 30,605/x
3. Step 3: Cross multiply
   20,418x = 30,605 × 30,605
4. Step 4: Simplify right side
   20,418x = 936,666,025
5. Step 5: Solve for x
   x = 936,666,025/20,418
6. Step 6: Final answer
   x = 45,874.52