Finding the Third Proportional to 399,494 and 855,850

Step by Step Solution

1. Step 1: Write the proportion equation
   399,494 : 855,850 = 855,850 : x
2. Step 2: Convert to fraction form
   399,494/855,850 = 855,850/x
3. Step 3: Cross multiply
   399,494x = 855,850 × 855,850
4. Step 4: Simplify right side
   399,494x = 732,479,222,500
5. Step 5: Solve for x
   x = 732,479,222,500/399,494
6. Step 6: Final answer
   x = 1,833,517.46