Finding the Third Proportional to 1,420,686 and 2,173,311

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420,686 : 2,173,311 = 2,173,311 : x
2. Step 2: Convert to fraction form
   1,420,686/2,173,311 = 2,173,311/x
3. Step 3: Cross multiply
   1,420,686x = 2,173,311 × 2,173,311
4. Step 4: Simplify right side
   1,420,686x = 4,723,280,702,721
5. Step 5: Solve for x
   x = 4,723,280,702,721/1,420,686
6. Step 6: Final answer
   x = 3,324,647.88