Finding the Fourth Proportional to 3,916.60, 5,404.86 and 2,238.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.60 : 5,404.86 = 2,238.04 : x
2. Step 2: Convert to fraction form
   3,916.60/5,404.86 = 2,238.04/x
3. Step 3: Cross multiply
   3,916.60x = 5,404.86 × 2,238.04
4. Step 4: Simplify right side
   3,916.60x = 12,096,292.87
5. Step 5: Solve for x
   x = 12,096,292.87/3,916.60
6. Step 6: Final answer
   x = 3,088.47