Finding the Third Proportional to 1,640,643 and 3,568,518

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640,643 : 3,568,518 = 3,568,518 : x
2. Step 2: Convert to fraction form
   1,640,643/3,568,518 = 3,568,518/x
3. Step 3: Cross multiply
   1,640,643x = 3,568,518 × 3,568,518
4. Step 4: Simplify right side
   1,640,643x = 12,734,320,716,324
5. Step 5: Solve for x
   x = 12,734,320,716,324/1,640,643
6. Step 6: Final answer
   x = 7,761,786.52