Finding the Third Proportional to 30,716 and 62,728

Step by Step Solution

1. Step 1: Write the proportion equation
   30,716 : 62,728 = 62,728 : x
2. Step 2: Convert to fraction form
   30,716/62,728 = 62,728/x
3. Step 3: Cross multiply
   30,716x = 62,728 × 62,728
4. Step 4: Simplify right side
   30,716x = 3,934,801,984
5. Step 5: Solve for x
   x = 3,934,801,984/30,716
6. Step 6: Final answer
   x = 128,102.68