Finding the Third Proportional to 1,561,664 and 3,258,880

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561,664 : 3,258,880 = 3,258,880 : x
2. Step 2: Convert to fraction form
   1,561,664/3,258,880 = 3,258,880/x
3. Step 3: Cross multiply
   1,561,664x = 3,258,880 × 3,258,880
4. Step 4: Simplify right side
   1,561,664x = 10,620,298,854,400
5. Step 5: Solve for x
   x = 10,620,298,854,400/1,561,664
6. Step 6: Final answer
   x = 6,800,629.88