Finding the Third Proportional to 321,976.50 and 699,262.50

Step by Step Solution

1. Step 1: Write the proportion equation
   321,976.50 : 699,262.50 = 699,262.50 : x
2. Step 2: Convert to fraction form
   321,976.50/699,262.50 = 699,262.50/x
3. Step 3: Cross multiply
   321,976.50x = 699,262.50 × 699,262.50
4. Step 4: Simplify right side
   321,976.50x = 488,968,043,906.25
5. Step 5: Solve for x
   x = 488,968,043,906.25/321,976.50
6. Step 6: Final answer
   x = 1,518,645.13