Finding the Third Proportional to 394,377.75 and 863,388

Step by Step Solution

1. Step 1: Write the proportion equation
   394,377.75 : 863,388 = 863,388 : x
2. Step 2: Convert to fraction form
   394,377.75/863,388 = 863,388/x
3. Step 3: Cross multiply
   394,377.75x = 863,388 × 863,388
4. Step 4: Simplify right side
   394,377.75x = 745,438,838,544
5. Step 5: Solve for x
   x = 745,438,838,544/394,377.75
6. Step 6: Final answer
   x = 1,890,164.54