Finding the Fourth Proportional to 3,916.36, 5,404.55 and 2,238.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.36 : 5,404.55 = 2,238.28 : x
2. Step 2: Convert to fraction form
   3,916.36/5,404.55 = 2,238.28/x
3. Step 3: Cross multiply
   3,916.36x = 5,404.55 × 2,238.28
4. Step 4: Simplify right side
   3,916.36x = 12,096,857.96
5. Step 5: Solve for x
   x = 12,096,857.96/3,916.36
6. Step 6: Final answer
   x = 3,088.81