Finding the Third Proportional to 271,785 and 639,493.50

Step by Step Solution

1. Step 1: Write the proportion equation
   271,785 : 639,493.50 = 639,493.50 : x
2. Step 2: Convert to fraction form
   271,785/639,493.50 = 639,493.50/x
3. Step 3: Cross multiply
   271,785x = 639,493.50 × 639,493.50
4. Step 4: Simplify right side
   271,785x = 408,951,936,542.25
5. Step 5: Solve for x
   x = 408,951,936,542.25/271,785
6. Step 6: Final answer
   x = 1,504,689.13