Finding the Third Proportional to 9,918 and 20,484

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918 : 20,484 = 20,484 : x
2. Step 2: Convert to fraction form
   9,918/20,484 = 20,484/x
3. Step 3: Cross multiply
   9,918x = 20,484 × 20,484
4. Step 4: Simplify right side
   9,918x = 419,594,256
5. Step 5: Solve for x
   x = 419,594,256/9,918
6. Step 6: Final answer
   x = 42,306.34