Finding the Third Proportional to 8,856 and 13,920

Step by Step Solution

1. Step 1: Write the proportion equation
   8,856 : 13,920 = 13,920 : x
2. Step 2: Convert to fraction form
   8,856/13,920 = 13,920/x
3. Step 3: Cross multiply
   8,856x = 13,920 × 13,920
4. Step 4: Simplify right side
   8,856x = 193,766,400
5. Step 5: Solve for x
   x = 193,766,400/8,856
6. Step 6: Final answer
   x = 21,879.67