Finding the Third Proportional to 394,429.69 and 863,939.25

Step by Step Solution

1. Step 1: Write the proportion equation
   394,429.69 : 863,939.25 = 863,939.25 : x
2. Step 2: Convert to fraction form
   394,429.69/863,939.25 = 863,939.25/x
3. Step 3: Cross multiply
   394,429.69x = 863,939.25 × 863,939.25
4. Step 4: Simplify right side
   394,429.69x = 746,391,027,690.56
5. Step 5: Solve for x
   x = 746,391,027,690.56/394,429.69
6. Step 6: Final answer
   x = 1,892,329.74