Finding the Third Proportional to 639,503 and 1,381,469

Step by Step Solution

1. Step 1: Write the proportion equation
   639,503 : 1,381,469 = 1,381,469 : x
2. Step 2: Convert to fraction form
   639,503/1,381,469 = 1,381,469/x
3. Step 3: Cross multiply
   639,503x = 1,381,469 × 1,381,469
4. Step 4: Simplify right side
   639,503x = 1,908,456,597,961
5. Step 5: Solve for x
   x = 1,908,456,597,961/639,503
6. Step 6: Final answer
   x = 2,984,280.91