Finding the Third Proportional to 396,981 and 865,343.25

Step by Step Solution

1. Step 1: Write the proportion equation
   396,981 : 865,343.25 = 865,343.25 : x
2. Step 2: Convert to fraction form
   396,981/865,343.25 = 865,343.25/x
3. Step 3: Cross multiply
   396,981x = 865,343.25 × 865,343.25
4. Step 4: Simplify right side
   396,981x = 748,818,940,320.56
5. Step 5: Solve for x
   x = 748,818,940,320.56/396,981
6. Step 6: Final answer
   x = 1,886,284.08