Finding the Third Proportional to 399,657 and 855,996

Step by Step Solution

1. Step 1: Write the proportion equation
   399,657 : 855,996 = 855,996 : x
2. Step 2: Convert to fraction form
   399,657/855,996 = 855,996/x
3. Step 3: Cross multiply
   399,657x = 855,996 × 855,996
4. Step 4: Simplify right side
   399,657x = 732,729,152,016
5. Step 5: Solve for x
   x = 732,729,152,016/399,657
6. Step 6: Final answer
   x = 1,833,395.02