Finding the Fourth Proportional to 2,087.51, 3,131.87 and 854.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.51 : 3,131.87 = 854.96 : x
2. Step 2: Convert to fraction form
   2,087.51/3,131.87 = 854.96/x
3. Step 3: Cross multiply
   2,087.51x = 3,131.87 × 854.96
4. Step 4: Simplify right side
   2,087.51x = 2,677,603.64
5. Step 5: Solve for x
   x = 2,677,603.64/2,087.51
6. Step 6: Final answer
   x = 1,282.68