Finding the Third Proportional to 1,640,642 and 3,568,516

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640,642 : 3,568,516 = 3,568,516 : x
2. Step 2: Convert to fraction form
   1,640,642/3,568,516 = 3,568,516/x
3. Step 3: Cross multiply
   1,640,642x = 3,568,516 × 3,568,516
4. Step 4: Simplify right side
   1,640,642x = 12,734,306,442,256
5. Step 5: Solve for x
   x = 12,734,306,442,256/1,640,642
6. Step 6: Final answer
   x = 7,761,782.55