Finding the Third Proportional to 630,720 and 1,401,408

Step by Step Solution

1. Step 1: Write the proportion equation
   630,720 : 1,401,408 = 1,401,408 : x
2. Step 2: Convert to fraction form
   630,720/1,401,408 = 1,401,408/x
3. Step 3: Cross multiply
   630,720x = 1,401,408 × 1,401,408
4. Step 4: Simplify right side
   630,720x = 1,963,944,382,464
5. Step 5: Solve for x
   x = 1,963,944,382,464/630,720
6. Step 6: Final answer
   x = 3,113,813.39