Finding the Third Proportional to 315,628 and 443,955

Step by Step Solution

1. Step 1: Write the proportion equation
   315,628 : 443,955 = 443,955 : x
2. Step 2: Convert to fraction form
   315,628/443,955 = 443,955/x
3. Step 3: Cross multiply
   315,628x = 443,955 × 443,955
4. Step 4: Simplify right side
   315,628x = 197,096,042,025
5. Step 5: Solve for x
   x = 197,096,042,025/315,628
6. Step 6: Final answer
   x = 624,456.77