Finding the Fourth Proportional to 2,572.27, 3,858.37 and 817.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.27 : 3,858.37 = 817.27 : x
2. Step 2: Convert to fraction form
   2,572.27/3,858.37 = 817.27/x
3. Step 3: Cross multiply
   2,572.27x = 3,858.37 × 817.27
4. Step 4: Simplify right side
   2,572.27x = 3,153,330.05
5. Step 5: Solve for x
   x = 3,153,330.05/2,572.27
6. Step 6: Final answer
   x = 1,225.89