Finding the Third Proportional to 321,949.69 and 699,212.25

Step by Step Solution

1. Step 1: Write the proportion equation
   321,949.69 : 699,212.25 = 699,212.25 : x
2. Step 2: Convert to fraction form
   321,949.69/699,212.25 = 699,212.25/x
3. Step 3: Cross multiply
   321,949.69x = 699,212.25 × 699,212.25
4. Step 4: Simplify right side
   321,949.69x = 488,897,770,550.06
5. Step 5: Solve for x
   x = 488,897,770,550.06/321,949.69
6. Step 6: Final answer
   x = 1,518,553.33