Finding the Third Proportional to 2,857,686 and 3,936,609

Step by Step Solution

1. Step 1: Write the proportion equation
   2,857,686 : 3,936,609 = 3,936,609 : x
2. Step 2: Convert to fraction form
   2,857,686/3,936,609 = 3,936,609/x
3. Step 3: Cross multiply
   2,857,686x = 3,936,609 × 3,936,609
4. Step 4: Simplify right side
   2,857,686x = 15,496,890,418,881
5. Step 5: Solve for x
   x = 15,496,890,418,881/2,857,686
6. Step 6: Final answer
   x = 5,422,880.76