Finding the Fourth Proportional to 2,088.27, 3,131.69 and 855.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.27 : 3,131.69 = 855.33 : x
2. Step 2: Convert to fraction form
   2,088.27/3,131.69 = 855.33/x
3. Step 3: Cross multiply
   2,088.27x = 3,131.69 × 855.33
4. Step 4: Simplify right side
   2,088.27x = 2,678,624.13
5. Step 5: Solve for x
   x = 2,678,624.13/2,088.27
6. Step 6: Final answer
   x = 1,282.70