Finding the Third Proportional to 394,809 and 635,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,809 : 635,818.50 = 635,818.50 : x
2. Step 2: Convert to fraction form
   394,809/635,818.50 = 635,818.50/x
3. Step 3: Cross multiply
   394,809x = 635,818.50 × 635,818.50
4. Step 4: Simplify right side
   394,809x = 404,265,164,942.25
5. Step 5: Solve for x
   x = 404,265,164,942.25/394,809
6. Step 6: Final answer
   x = 1,023,951.24