Finding the Third Proportional to 3,288,640 and 7,173,320

Step by Step Solution

1. Step 1: Write the proportion equation
   3,288,640 : 7,173,320 = 7,173,320 : x
2. Step 2: Convert to fraction form
   3,288,640/7,173,320 = 7,173,320/x
3. Step 3: Cross multiply
   3,288,640x = 7,173,320 × 7,173,320
4. Step 4: Simplify right side
   3,288,640x = 51,456,519,822,400
5. Step 5: Solve for x
   x = 51,456,519,822,400/3,288,640
6. Step 6: Final answer
   x = 15,646,747.54