Finding the Third Proportional to 644,978 and 1,401,898

Step by Step Solution

1. Step 1: Write the proportion equation
   644,978 : 1,401,898 = 1,401,898 : x
2. Step 2: Convert to fraction form
   644,978/1,401,898 = 1,401,898/x
3. Step 3: Cross multiply
   644,978x = 1,401,898 × 1,401,898
4. Step 4: Simplify right side
   644,978x = 1,965,318,002,404
5. Step 5: Solve for x
   x = 1,965,318,002,404/644,978
6. Step 6: Final answer
   x = 3,047,108.59