Finding the Third Proportional to 644,560 and 1,418,000

Step by Step Solution

1. Step 1: Write the proportion equation
   644,560 : 1,418,000 = 1,418,000 : x
2. Step 2: Convert to fraction form
   644,560/1,418,000 = 1,418,000/x
3. Step 3: Cross multiply
   644,560x = 1,418,000 × 1,418,000
4. Step 4: Simplify right side
   644,560x = 2,010,724,000,000
5. Step 5: Solve for x
   x = 2,010,724,000,000/644,560
6. Step 6: Final answer
   x = 3,119,529.60