Finding the Fourth Proportional to 2,088.20, 3,131.25 and 855.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.20 : 3,131.25 = 855.27 : x
2. Step 2: Convert to fraction form
   2,088.20/3,131.25 = 855.27/x
3. Step 3: Cross multiply
   2,088.20x = 3,131.25 × 855.27
4. Step 4: Simplify right side
   2,088.20x = 2,678,064.19
5. Step 5: Solve for x
   x = 2,678,064.19/2,088.20
6. Step 6: Final answer
   x = 1,282.48