Finding the Fourth Proportional to 2,087.33, 3,130.76 and 854.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.33 : 3,130.76 = 854.87 : x
2. Step 2: Convert to fraction form
   2,087.33/3,130.76 = 854.87/x
3. Step 3: Cross multiply
   2,087.33x = 3,130.76 × 854.87
4. Step 4: Simplify right side
   2,087.33x = 2,676,379.28
5. Step 5: Solve for x
   x = 2,676,379.28/2,087.33
6. Step 6: Final answer
   x = 1,282.21