Finding the Third Proportional to 315,639 and 443,971.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,639 : 443,971.50 = 443,971.50 : x
2. Step 2: Convert to fraction form
   315,639/443,971.50 = 443,971.50/x
3. Step 3: Cross multiply
   315,639x = 443,971.50 × 443,971.50
4. Step 4: Simplify right side
   315,639x = 197,110,692,812.25
5. Step 5: Solve for x
   x = 197,110,692,812.25/315,639
6. Step 6: Final answer
   x = 624,481.43