Finding the Third Proportional to 20,638 and 30,908

Step by Step Solution

1. Step 1: Write the proportion equation
   20,638 : 30,908 = 30,908 : x
2. Step 2: Convert to fraction form
   20,638/30,908 = 30,908/x
3. Step 3: Cross multiply
   20,638x = 30,908 × 30,908
4. Step 4: Simplify right side
   20,638x = 955,304,464
5. Step 5: Solve for x
   x = 955,304,464/20,638
6. Step 6: Final answer
   x = 46,288.62