Finding the Third Proportional to 315,620 and 443,943

Step by Step Solution

1. Step 1: Write the proportion equation
   315,620 : 443,943 = 443,943 : x
2. Step 2: Convert to fraction form
   315,620/443,943 = 443,943/x
3. Step 3: Cross multiply
   315,620x = 443,943 × 443,943
4. Step 4: Simplify right side
   315,620x = 197,085,387,249
5. Step 5: Solve for x
   x = 197,085,387,249/315,620
6. Step 6: Final answer
   x = 624,438.84