Finding the Fourth Proportional to 2,087.34, 2,880.42 and 1,143.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.34 : 2,880.42 = 1,143.11 : x
2. Step 2: Convert to fraction form
   2,087.34/2,880.42 = 1,143.11/x
3. Step 3: Cross multiply
   2,087.34x = 2,880.42 × 1,143.11
4. Step 4: Simplify right side
   2,087.34x = 3,292,622.50
5. Step 5: Solve for x
   x = 3,292,622.50/2,087.34
6. Step 6: Final answer
   x = 1,577.43