Finding the Third Proportional to 20,638 and 43,940

Step by Step Solution

1. Step 1: Write the proportion equation
   20,638 : 43,940 = 43,940 : x
2. Step 2: Convert to fraction form
   20,638/43,940 = 43,940/x
3. Step 3: Cross multiply
   20,638x = 43,940 × 43,940
4. Step 4: Simplify right side
   20,638x = 1,930,723,600
5. Step 5: Solve for x
   x = 1,930,723,600/20,638
6. Step 6: Final answer
   x = 93,551.88