Finding the Third Proportional to 1,639,478 and 3,360,604

Step by Step Solution

1. Step 1: Write the proportion equation
   1,639,478 : 3,360,604 = 3,360,604 : x
2. Step 2: Convert to fraction form
   1,639,478/3,360,604 = 3,360,604/x
3. Step 3: Cross multiply
   1,639,478x = 3,360,604 × 3,360,604
4. Step 4: Simplify right side
   1,639,478x = 11,293,659,244,816
5. Step 5: Solve for x
   x = 11,293,659,244,816/1,639,478
6. Step 6: Final answer
   x = 6,888,570.17