Finding the Third Proportional to 315,602 and 443,915

Step by Step Solution

1. Step 1: Write the proportion equation
   315,602 : 443,915 = 443,915 : x
2. Step 2: Convert to fraction form
   315,602/443,915 = 443,915/x
3. Step 3: Cross multiply
   315,602x = 443,915 × 443,915
4. Step 4: Simplify right side
   315,602x = 197,060,527,225
5. Step 5: Solve for x
   x = 197,060,527,225/315,602
6. Step 6: Final answer
   x = 624,395.69