Finding the Third Proportional to 644,558 and 1,417,996

Step by Step Solution

1. Step 1: Write the proportion equation
   644,558 : 1,417,996 = 1,417,996 : x
2. Step 2: Convert to fraction form
   644,558/1,417,996 = 1,417,996/x
3. Step 3: Cross multiply
   644,558x = 1,417,996 × 1,417,996
4. Step 4: Simplify right side
   644,558x = 2,010,712,656,016
5. Step 5: Solve for x
   x = 2,010,712,656,016/644,558
6. Step 6: Final answer
   x = 3,119,521.68