Finding the Third Proportional to 13,920 and 20,112

Step by Step Solution

1. Step 1: Write the proportion equation
   13,920 : 20,112 = 20,112 : x
2. Step 2: Convert to fraction form
   13,920/20,112 = 20,112/x
3. Step 3: Cross multiply
   13,920x = 20,112 × 20,112
4. Step 4: Simplify right side
   13,920x = 404,492,544
5. Step 5: Solve for x
   x = 404,492,544/13,920
6. Step 6: Final answer
   x = 29,058.37