Finding the Third Proportional to 394,419.50 and 863,469

Step by Step Solution

1. Step 1: Write the proportion equation
   394,419.50 : 863,469 = 863,469 : x
2. Step 2: Convert to fraction form
   394,419.50/863,469 = 863,469/x
3. Step 3: Cross multiply
   394,419.50x = 863,469 × 863,469
4. Step 4: Simplify right side
   394,419.50x = 745,578,713,961
5. Step 5: Solve for x
   x = 745,578,713,961/394,419.50
6. Step 6: Final answer
   x = 1,890,319.10