Finding the Third Proportional to 678,986 and 1,413,738

Step by Step Solution

1. Step 1: Write the proportion equation
   678,986 : 1,413,738 = 1,413,738 : x
2. Step 2: Convert to fraction form
   678,986/1,413,738 = 1,413,738/x
3. Step 3: Cross multiply
   678,986x = 1,413,738 × 1,413,738
4. Step 4: Simplify right side
   678,986x = 1,998,655,132,644
5. Step 5: Solve for x
   x = 1,998,655,132,644/678,986
6. Step 6: Final answer
   x = 2,943,588.13