Finding the Third Proportional to 1,396,740 and 2,135,721

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396,740 : 2,135,721 = 2,135,721 : x
2. Step 2: Convert to fraction form
   1,396,740/2,135,721 = 2,135,721/x
3. Step 3: Cross multiply
   1,396,740x = 2,135,721 × 2,135,721
4. Step 4: Simplify right side
   1,396,740x = 4,561,304,189,841
5. Step 5: Solve for x
   x = 4,561,304,189,841/1,396,740
6. Step 6: Final answer
   x = 3,265,678.79