Finding the Third Proportional to 571.38 and 855.50

Step by Step Solution

1. Step 1: Write the proportion equation
   571.38 : 855.50 = 855.50 : x
2. Step 2: Convert to fraction form
   571.38/855.50 = 855.50/x
3. Step 3: Cross multiply
   571.38x = 855.50 × 855.50
4. Step 4: Simplify right side
   571.38x = 731,880.25
5. Step 5: Solve for x
   x = 731,880.25/571.38
6. Step 6: Final answer
   x = 1,280.91