Finding the Fourth Proportional to 2,087.50, 2,880.79 and 1,143.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.50 : 2,880.79 = 1,143.33 : x
2. Step 2: Convert to fraction form
   2,087.50/2,880.79 = 1,143.33/x
3. Step 3: Cross multiply
   2,087.50x = 2,880.79 × 1,143.33
4. Step 4: Simplify right side
   2,087.50x = 3,293,693.63
5. Step 5: Solve for x
   x = 3,293,693.63/2,087.50
6. Step 6: Final answer
   x = 1,577.82