Finding the Third Proportional to 1,328,728 and 3,119,401

Step by Step Solution

1. Step 1: Write the proportion equation
   1,328,728 : 3,119,401 = 3,119,401 : x
2. Step 2: Convert to fraction form
   1,328,728/3,119,401 = 3,119,401/x
3. Step 3: Cross multiply
   1,328,728x = 3,119,401 × 3,119,401
4. Step 4: Simplify right side
   1,328,728x = 9,730,662,598,801
5. Step 5: Solve for x
   x = 9,730,662,598,801/1,328,728
6. Step 6: Final answer
   x = 7,323,291.60