Finding the Third Proportional to 1,638,661 and 3,342,382

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,661 : 3,342,382 = 3,342,382 : x
2. Step 2: Convert to fraction form
   1,638,661/3,342,382 = 3,342,382/x
3. Step 3: Cross multiply
   1,638,661x = 3,342,382 × 3,342,382
4. Step 4: Simplify right side
   1,638,661x = 11,171,517,433,924
5. Step 5: Solve for x
   x = 11,171,517,433,924/1,638,661
6. Step 6: Final answer
   x = 6,817,467.09