Finding the Fourth Proportional to 2,087.91, 3,132.03 and 855.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.91 : 3,132.03 = 855.60 : x
2. Step 2: Convert to fraction form
   2,087.91/3,132.03 = 855.60/x
3. Step 3: Cross multiply
   2,087.91x = 3,132.03 × 855.60
4. Step 4: Simplify right side
   2,087.91x = 2,679,756.33
5. Step 5: Solve for x
   x = 2,679,756.33/2,087.91
6. Step 6: Final answer
   x = 1,283.46