Finding the Third Proportional to 644,342 and 1,381,996

Step by Step Solution

1. Step 1: Write the proportion equation
   644,342 : 1,381,996 = 1,381,996 : x
2. Step 2: Convert to fraction form
   644,342/1,381,996 = 1,381,996/x
3. Step 3: Cross multiply
   644,342x = 1,381,996 × 1,381,996
4. Step 4: Simplify right side
   644,342x = 1,909,912,944,016
5. Step 5: Solve for x
   x = 1,909,912,944,016/644,342
6. Step 6: Final answer
   x = 2,964,129.21