Finding the Third Proportional to 20,160 and 41,760

Step by Step Solution

1. Step 1: Write the proportion equation
   20,160 : 41,760 = 41,760 : x
2. Step 2: Convert to fraction form
   20,160/41,760 = 41,760/x
3. Step 3: Cross multiply
   20,160x = 41,760 × 41,760
4. Step 4: Simplify right side
   20,160x = 1,743,897,600
5. Step 5: Solve for x
   x = 1,743,897,600/20,160
6. Step 6: Final answer
   x = 86,502.86