Finding the Third Proportional to 20,117 and 42,655

Step by Step Solution

1. Step 1: Write the proportion equation
   20,117 : 42,655 = 42,655 : x
2. Step 2: Convert to fraction form
   20,117/42,655 = 42,655/x
3. Step 3: Cross multiply
   20,117x = 42,655 × 42,655
4. Step 4: Simplify right side
   20,117x = 1,819,449,025
5. Step 5: Solve for x
   x = 1,819,449,025/20,117
6. Step 6: Final answer
   x = 90,443.36