Finding the Third Proportional to 20,160 and 42,760

Step by Step Solution

1. Step 1: Write the proportion equation
   20,160 : 42,760 = 42,760 : x
2. Step 2: Convert to fraction form
   20,160/42,760 = 42,760/x
3. Step 3: Cross multiply
   20,160x = 42,760 × 42,760
4. Step 4: Simplify right side
   20,160x = 1,828,417,600
5. Step 5: Solve for x
   x = 1,828,417,600/20,160
6. Step 6: Final answer
   x = 90,695.32