Finding the Third Proportional to 394,035 and 624,040.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,035 : 624,040.50 = 624,040.50 : x
2. Step 2: Convert to fraction form
   394,035/624,040.50 = 624,040.50/x
3. Step 3: Cross multiply
   394,035x = 624,040.50 × 624,040.50
4. Step 4: Simplify right side
   394,035x = 389,426,545,640.25
5. Step 5: Solve for x
   x = 389,426,545,640.25/394,035
6. Step 6: Final answer
   x = 988,304.45