Finding the Fourth Proportional to 3,916.27, 5,404.42 and 2,147.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.27 : 5,404.42 = 2,147.77 : x
2. Step 2: Convert to fraction form
   3,916.27/5,404.42 = 2,147.77/x
3. Step 3: Cross multiply
   3,916.27x = 5,404.42 × 2,147.77
4. Step 4: Simplify right side
   3,916.27x = 11,607,451.14
5. Step 5: Solve for x
   x = 11,607,451.14/3,916.27
6. Step 6: Final answer
   x = 2,963.90