Finding the Fourth Proportional to 2,073.81, 2,861.87 and 1,142.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.81 : 2,861.87 = 1,142.31 : x
2. Step 2: Convert to fraction form
   2,073.81/2,861.87 = 1,142.31/x
3. Step 3: Cross multiply
   2,073.81x = 2,861.87 × 1,142.31
4. Step 4: Simplify right side
   2,073.81x = 3,269,142.72
5. Step 5: Solve for x
   x = 3,269,142.72/2,073.81
6. Step 6: Final answer
   x = 1,576.39