Finding the Third Proportional to 1,390,770 and 2,105,649

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,770 : 2,105,649 = 2,105,649 : x
2. Step 2: Convert to fraction form
   1,390,770/2,105,649 = 2,105,649/x
3. Step 3: Cross multiply
   1,390,770x = 2,105,649 × 2,105,649
4. Step 4: Simplify right side
   1,390,770x = 4,433,757,711,201
5. Step 5: Solve for x
   x = 4,433,757,711,201/1,390,770
6. Step 6: Final answer
   x = 3,187,987.74