Finding the Fourth Proportional to 3,916.10, 5,404.14 and 2,147.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.10 : 5,404.14 = 2,147.69 : x
2. Step 2: Convert to fraction form
   3,916.10/5,404.14 = 2,147.69/x
3. Step 3: Cross multiply
   3,916.10x = 5,404.14 × 2,147.69
4. Step 4: Simplify right side
   3,916.10x = 11,606,390.42
5. Step 5: Solve for x
   x = 11,606,390.42/3,916.10
6. Step 6: Final answer
   x = 2,963.77