Finding the Third Proportional to 271,433.50 and 399,255.50

Step by Step Solution

1. Step 1: Write the proportion equation
   271,433.50 : 399,255.50 = 399,255.50 : x
2. Step 2: Convert to fraction form
   271,433.50/399,255.50 = 399,255.50/x
3. Step 3: Cross multiply
   271,433.50x = 399,255.50 × 399,255.50
4. Step 4: Simplify right side
   271,433.50x = 159,404,954,280.25
5. Step 5: Solve for x
   x = 159,404,954,280.25/271,433.50
6. Step 6: Final answer
   x = 587,270.75