Finding the Third Proportional to 20,155 and 42,551

Step by Step Solution

1. Step 1: Write the proportion equation
   20,155 : 42,551 = 42,551 : x
2. Step 2: Convert to fraction form
   20,155/42,551 = 42,551/x
3. Step 3: Cross multiply
   20,155x = 42,551 × 42,551
4. Step 4: Simplify right side
   20,155x = 1,810,587,601
5. Step 5: Solve for x
   x = 1,810,587,601/20,155
6. Step 6: Final answer
   x = 89,833.17