Finding the Third Proportional to 20,557 and 42,735

Step by Step Solution

1. Step 1: Write the proportion equation
   20,557 : 42,735 = 42,735 : x
2. Step 2: Convert to fraction form
   20,557/42,735 = 42,735/x
3. Step 3: Cross multiply
   20,557x = 42,735 × 42,735
4. Step 4: Simplify right side
   20,557x = 1,826,280,225
5. Step 5: Solve for x
   x = 1,826,280,225/20,557
6. Step 6: Final answer
   x = 88,839.82