Finding the Third Proportional to 8,920 and 13,810

Step by Step Solution

1. Step 1: Write the proportion equation
   8,920 : 13,810 = 13,810 : x
2. Step 2: Convert to fraction form
   8,920/13,810 = 13,810/x
3. Step 3: Cross multiply
   8,920x = 13,810 × 13,810
4. Step 4: Simplify right side
   8,920x = 190,716,100
5. Step 5: Solve for x
   x = 190,716,100/8,920
6. Step 6: Final answer
   x = 21,380.73