Finding the Fourth Proportional to 2,074.21, 2,862.40 and 1,142.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.21 : 2,862.40 = 1,142.71 : x
2. Step 2: Convert to fraction form
   2,074.21/2,862.40 = 1,142.71/x
3. Step 3: Cross multiply
   2,074.21x = 2,862.40 × 1,142.71
4. Step 4: Simplify right side
   2,074.21x = 3,270,893.10
5. Step 5: Solve for x
   x = 3,270,893.10/2,074.21
6. Step 6: Final answer
   x = 1,576.93