Finding the Third Proportional to 155,568 and 321,504

Step by Step Solution

1. Step 1: Write the proportion equation
   155,568 : 321,504 = 321,504 : x
2. Step 2: Convert to fraction form
   155,568/321,504 = 321,504/x
3. Step 3: Cross multiply
   155,568x = 321,504 × 321,504
4. Step 4: Simplify right side
   155,568x = 103,364,822,016
5. Step 5: Solve for x
   x = 103,364,822,016/155,568
6. Step 6: Final answer
   x = 664,434.99