Finding the Fourth Proportional to 3,916.24, 5,404.69 and 2,238.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.24 : 5,404.69 = 2,238.15 : x
2. Step 2: Convert to fraction form
   3,916.24/5,404.69 = 2,238.15/x
3. Step 3: Cross multiply
   3,916.24x = 5,404.69 × 2,238.15
4. Step 4: Simplify right side
   3,916.24x = 12,096,506.92
5. Step 5: Solve for x
   x = 12,096,506.92/3,916.24
6. Step 6: Final answer
   x = 3,088.81