Finding the Third Proportional to 16,920 and 18,384

Step by Step Solution

1. Step 1: Write the proportion equation
   16,920 : 18,384 = 18,384 : x
2. Step 2: Convert to fraction form
   16,920/18,384 = 18,384/x
3. Step 3: Cross multiply
   16,920x = 18,384 × 18,384
4. Step 4: Simplify right side
   16,920x = 337,971,456
5. Step 5: Solve for x
   x = 337,971,456/16,920
6. Step 6: Final answer
   x = 19,974.67