Finding the Third Proportional to 315,624 and 443,949

Step by Step Solution

1. Step 1: Write the proportion equation
   315,624 : 443,949 = 443,949 : x
2. Step 2: Convert to fraction form
   315,624/443,949 = 443,949/x
3. Step 3: Cross multiply
   315,624x = 443,949 × 443,949
4. Step 4: Simplify right side
   315,624x = 197,090,714,601
5. Step 5: Solve for x
   x = 197,090,714,601/315,624
6. Step 6: Final answer
   x = 624,447.81