Finding the Third Proportional to 326,484.38 and 686,016.75

Step by Step Solution

1. Step 1: Write the proportion equation
   326,484.38 : 686,016.75 = 686,016.75 : x
2. Step 2: Convert to fraction form
   326,484.38/686,016.75 = 686,016.75/x
3. Step 3: Cross multiply
   326,484.38x = 686,016.75 × 686,016.75
4. Step 4: Simplify right side
   326,484.38x = 470,618,981,280.56
5. Step 5: Solve for x
   x = 470,618,981,280.56/326,484.38
6. Step 6: Final answer
   x = 1,441,474.75