Finding the Third Proportional to 172,018 and 356,180

Step by Step Solution

1. Step 1: Write the proportion equation
   172,018 : 356,180 = 356,180 : x
2. Step 2: Convert to fraction form
   172,018/356,180 = 356,180/x
3. Step 3: Cross multiply
   172,018x = 356,180 × 356,180
4. Step 4: Simplify right side
   172,018x = 126,864,192,400
5. Step 5: Solve for x
   x = 126,864,192,400/172,018
6. Step 6: Final answer
   x = 737,505.33