Finding the Third Proportional to 151,612 and 321,708

Step by Step Solution

1. Step 1: Write the proportion equation
   151,612 : 321,708 = 321,708 : x
2. Step 2: Convert to fraction form
   151,612/321,708 = 321,708/x
3. Step 3: Cross multiply
   151,612x = 321,708 × 321,708
4. Step 4: Simplify right side
   151,612x = 103,496,037,264
5. Step 5: Solve for x
   x = 103,496,037,264/151,612
6. Step 6: Final answer
   x = 682,637.50