Finding the Fourth Proportional to 2,087.49, 3,131.13 and 854.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.49 : 3,131.13 = 854.59 : x
2. Step 2: Convert to fraction form
   2,087.49/3,131.13 = 854.59/x
3. Step 3: Cross multiply
   2,087.49x = 3,131.13 × 854.59
4. Step 4: Simplify right side
   2,087.49x = 2,675,832.39
5. Step 5: Solve for x
   x = 2,675,832.39/2,087.49
6. Step 6: Final answer
   x = 1,281.85