Finding the Fourth Proportional to 2,074.38, 2,862.69 and 1,142.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.38 : 2,862.69 = 1,142.88 : x
2. Step 2: Convert to fraction form
   2,074.38/2,862.69 = 1,142.88/x
3. Step 3: Cross multiply
   2,074.38x = 2,862.69 × 1,142.88
4. Step 4: Simplify right side
   2,074.38x = 3,271,696.83
5. Step 5: Solve for x
   x = 3,271,696.83/2,074.38
6. Step 6: Final answer
   x = 1,577.20