Finding the Third Proportional to 321,148.50 and 699,504

Step by Step Solution

1. Step 1: Write the proportion equation
   321,148.50 : 699,504 = 699,504 : x
2. Step 2: Convert to fraction form
   321,148.50/699,504 = 699,504/x
3. Step 3: Cross multiply
   321,148.50x = 699,504 × 699,504
4. Step 4: Simplify right side
   321,148.50x = 489,305,846,016
5. Step 5: Solve for x
   x = 489,305,846,016/321,148.50
6. Step 6: Final answer
   x = 1,523,612.43