Finding the Fourth Proportional to 2,087.24, 2,880.10 and 1,155.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.24 : 2,880.10 = 1,155.80 : x
2. Step 2: Convert to fraction form
   2,087.24/2,880.10 = 1,155.80/x
3. Step 3: Cross multiply
   2,087.24x = 2,880.10 × 1,155.80
4. Step 4: Simplify right side
   2,087.24x = 3,328,819.58
5. Step 5: Solve for x
   x = 3,328,819.58/2,087.24
6. Step 6: Final answer
   x = 1,594.84