Finding the Third Proportional to 1,639,240 and 3,359,408

Step by Step Solution

1. Step 1: Write the proportion equation
   1,639,240 : 3,359,408 = 3,359,408 : x
2. Step 2: Convert to fraction form
   1,639,240/3,359,408 = 3,359,408/x
3. Step 3: Cross multiply
   1,639,240x = 3,359,408 × 3,359,408
4. Step 4: Simplify right side
   1,639,240x = 11,285,622,110,464
5. Step 5: Solve for x
   x = 11,285,622,110,464/1,639,240
6. Step 6: Final answer
   x = 6,884,667.35