Finding the Third Proportional to 394,671 and 855,870

Step by Step Solution

1. Step 1: Write the proportion equation
   394,671 : 855,870 = 855,870 : x
2. Step 2: Convert to fraction form
   394,671/855,870 = 855,870/x
3. Step 3: Cross multiply
   394,671x = 855,870 × 855,870
4. Step 4: Simplify right side
   394,671x = 732,513,456,900
5. Step 5: Solve for x
   x = 732,513,456,900/394,671
6. Step 6: Final answer
   x = 1,856,010.34