Finding the Third Proportional to 394,398 and 863,426.25

Step by Step Solution

1. Step 1: Write the proportion equation
   394,398 : 863,426.25 = 863,426.25 : x
2. Step 2: Convert to fraction form
   394,398/863,426.25 = 863,426.25/x
3. Step 3: Cross multiply
   394,398x = 863,426.25 × 863,426.25
4. Step 4: Simplify right side
   394,398x = 745,504,889,189.06
5. Step 5: Solve for x
   x = 745,504,889,189.06/394,398
6. Step 6: Final answer
   x = 1,890,234.96