Finding the Third Proportional to 315,600 and 443,912

Step by Step Solution

1. Step 1: Write the proportion equation
   315,600 : 443,912 = 443,912 : x
2. Step 2: Convert to fraction form
   315,600/443,912 = 443,912/x
3. Step 3: Cross multiply
   315,600x = 443,912 × 443,912
4. Step 4: Simplify right side
   315,600x = 197,057,863,744
5. Step 5: Solve for x
   x = 197,057,863,744/315,600
6. Step 6: Final answer
   x = 624,391.20