Finding the Third Proportional to 394,420.50 and 863,472

Step by Step Solution

1. Step 1: Write the proportion equation
   394,420.50 : 863,472 = 863,472 : x
2. Step 2: Convert to fraction form
   394,420.50/863,472 = 863,472/x
3. Step 3: Cross multiply
   394,420.50x = 863,472 × 863,472
4. Step 4: Simplify right side
   394,420.50x = 745,583,894,784
5. Step 5: Solve for x
   x = 745,583,894,784/394,420.50
6. Step 6: Final answer
   x = 1,890,327.44