Finding the Third Proportional to 1,648,681 and 3,587,687

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648,681 : 3,587,687 = 3,587,687 : x
2. Step 2: Convert to fraction form
   1,648,681/3,587,687 = 3,587,687/x
3. Step 3: Cross multiply
   1,648,681x = 3,587,687 × 3,587,687
4. Step 4: Simplify right side
   1,648,681x = 12,871,498,009,969
5. Step 5: Solve for x
   x = 12,871,498,009,969/1,648,681
6. Step 6: Final answer
   x = 7,807,148.87