Finding the Fourth Proportional to 2,087.10, 2,880.19 and 1,155.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.10 : 2,880.19 = 1,155.60 : x
2. Step 2: Convert to fraction form
   2,087.10/2,880.19 = 1,155.60/x
3. Step 3: Cross multiply
   2,087.10x = 2,880.19 × 1,155.60
4. Step 4: Simplify right side
   2,087.10x = 3,328,333.16
5. Step 5: Solve for x
   x = 3,328,333.16/2,087.10
6. Step 6: Final answer
   x = 1,594.72