Finding the Fourth Proportional to 2,790.52, 4,182.71 and 1,228.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.52 : 4,182.71 = 1,228.87 : x
2. Step 2: Convert to fraction form
   2,790.52/4,182.71 = 1,228.87/x
3. Step 3: Cross multiply
   2,790.52x = 4,182.71 × 1,228.87
4. Step 4: Simplify right side
   2,790.52x = 5,139,979.78
5. Step 5: Solve for x
   x = 5,139,979.78/2,790.52
6. Step 6: Final answer
   x = 1,841.94