Finding the Fourth Proportional to 2,086.88, 2,880.07 and 1,155.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.88 : 2,880.07 = 1,155.56 : x
2. Step 2: Convert to fraction form
   2,086.88/2,880.07 = 1,155.56/x
3. Step 3: Cross multiply
   2,086.88x = 2,880.07 × 1,155.56
4. Step 4: Simplify right side
   2,086.88x = 3,328,076.40
5. Step 5: Solve for x
   x = 3,328,076.40/2,086.88
6. Step 6: Final answer
   x = 1,594.77