Finding the Third Proportional to 1,800,638 and 3,900,214

Step by Step Solution

1. Step 1: Write the proportion equation
   1,800,638 : 3,900,214 = 3,900,214 : x
2. Step 2: Convert to fraction form
   1,800,638/3,900,214 = 3,900,214/x
3. Step 3: Cross multiply
   1,800,638x = 3,900,214 × 3,900,214
4. Step 4: Simplify right side
   1,800,638x = 15,211,669,245,796
5. Step 5: Solve for x
   x = 15,211,669,245,796/1,800,638
6. Step 6: Final answer
   x = 8,447,933.04