Finding the Fourth Proportional to 2,073.78, 2,861.76 and 1,142.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.78 : 2,861.76 = 1,142.28 : x
2. Step 2: Convert to fraction form
   2,073.78/2,861.76 = 1,142.28/x
3. Step 3: Cross multiply
   2,073.78x = 2,861.76 × 1,142.28
4. Step 4: Simplify right side
   2,073.78x = 3,268,931.21
5. Step 5: Solve for x
   x = 3,268,931.21/2,073.78
6. Step 6: Final answer
   x = 1,576.32