Finding the Third Proportional to 326,721 and 707,741.25

Step by Step Solution

1. Step 1: Write the proportion equation
   326,721 : 707,741.25 = 707,741.25 : x
2. Step 2: Convert to fraction form
   326,721/707,741.25 = 707,741.25/x
3. Step 3: Cross multiply
   326,721x = 707,741.25 × 707,741.25
4. Step 4: Simplify right side
   326,721x = 500,897,676,951.56
5. Step 5: Solve for x
   x = 500,897,676,951.56/326,721
6. Step 6: Final answer
   x = 1,533,105.24