Finding the Fourth Proportional to 3,916.27, 5,404.54 and 2,147.97

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.27 : 5,404.54 = 2,147.97 : x
2. Step 2: Convert to fraction form
   3,916.27/5,404.54 = 2,147.97/x
3. Step 3: Cross multiply
   3,916.27x = 5,404.54 × 2,147.97
4. Step 4: Simplify right side
   3,916.27x = 11,608,789.78
5. Step 5: Solve for x
   x = 11,608,789.78/3,916.27
6. Step 6: Final answer
   x = 2,964.25