Finding the Third Proportional to 315,618 and 443,940

Step by Step Solution

1. Step 1: Write the proportion equation
   315,618 : 443,940 = 443,940 : x
2. Step 2: Convert to fraction form
   315,618/443,940 = 443,940/x
3. Step 3: Cross multiply
   315,618x = 443,940 × 443,940
4. Step 4: Simplify right side
   315,618x = 197,082,723,600
5. Step 5: Solve for x
   x = 197,082,723,600/315,618
6. Step 6: Final answer
   x = 624,434.36