Finding the Third Proportional to 774,779 and 1,678,243

Step by Step Solution

1. Step 1: Write the proportion equation
   774,779 : 1,678,243 = 1,678,243 : x
2. Step 2: Convert to fraction form
   774,779/1,678,243 = 1,678,243/x
3. Step 3: Cross multiply
   774,779x = 1,678,243 × 1,678,243
4. Step 4: Simplify right side
   774,779x = 2,816,499,567,049
5. Step 5: Solve for x
   x = 2,816,499,567,049/774,779
6. Step 6: Final answer
   x = 3,635,229.62