Finding the Third Proportional to 30,728 and 67,018

Step by Step Solution

1. Step 1: Write the proportion equation
   30,728 : 67,018 = 67,018 : x
2. Step 2: Convert to fraction form
   30,728/67,018 = 67,018/x
3. Step 3: Cross multiply
   30,728x = 67,018 × 67,018
4. Step 4: Simplify right side
   30,728x = 4,491,412,324
5. Step 5: Solve for x
   x = 4,491,412,324/30,728
6. Step 6: Final answer
   x = 146,166.76