Finding the Third Proportional to 1,640,644 and 3,568,520

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640,644 : 3,568,520 = 3,568,520 : x
2. Step 2: Convert to fraction form
   1,640,644/3,568,520 = 3,568,520/x
3. Step 3: Cross multiply
   1,640,644x = 3,568,520 × 3,568,520
4. Step 4: Simplify right side
   1,640,644x = 12,734,334,990,400
5. Step 5: Solve for x
   x = 12,734,334,990,400/1,640,644
6. Step 6: Final answer
   x = 7,761,790.49