Finding the Fourth Proportional to 2,082.42, 2,873.82 and 1,138.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.42 : 2,873.82 = 1,138.31 : x
2. Step 2: Convert to fraction form
   2,082.42/2,873.82 = 1,138.31/x
3. Step 3: Cross multiply
   2,082.42x = 2,873.82 × 1,138.31
4. Step 4: Simplify right side
   2,082.42x = 3,271,298.04
5. Step 5: Solve for x
   x = 3,271,298.04/2,082.42
6. Step 6: Final answer
   x = 1,570.91