Finding the Third Proportional to 644,338 and 1,381,988

Step by Step Solution

1. Step 1: Write the proportion equation
   644,338 : 1,381,988 = 1,381,988 : x
2. Step 2: Convert to fraction form
   644,338/1,381,988 = 1,381,988/x
3. Step 3: Cross multiply
   644,338x = 1,381,988 × 1,381,988
4. Step 4: Simplify right side
   644,338x = 1,909,890,832,144
5. Step 5: Solve for x
   x = 1,909,890,832,144/644,338
6. Step 6: Final answer
   x = 2,964,113.29