Finding the Third Proportional to 394,045.50 and 624,057

Step by Step Solution

1. Step 1: Write the proportion equation
   394,045.50 : 624,057 = 624,057 : x
2. Step 2: Convert to fraction form
   394,045.50/624,057 = 624,057/x
3. Step 3: Cross multiply
   394,045.50x = 624,057 × 624,057
4. Step 4: Simplify right side
   394,045.50x = 389,447,139,249
5. Step 5: Solve for x
   x = 389,447,139,249/394,045.50
6. Step 6: Final answer
   x = 988,330.38