Finding the Third Proportional to 305,143.50 and 443,863.50

Step by Step Solution

1. Step 1: Write the proportion equation
   305,143.50 : 443,863.50 = 443,863.50 : x
2. Step 2: Convert to fraction form
   305,143.50/443,863.50 = 443,863.50/x
3. Step 3: Cross multiply
   305,143.50x = 443,863.50 × 443,863.50
4. Step 4: Simplify right side
   305,143.50x = 197,014,806,632.25
5. Step 5: Solve for x
   x = 197,014,806,632.25/305,143.50
6. Step 6: Final answer
   x = 645,646.41