Finding the Fourth Proportional to 3,916.69, 5,405.14 and 2,238.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.69 : 5,405.14 = 2,238.37 : x
2. Step 2: Convert to fraction form
   3,916.69/5,405.14 = 2,238.37/x
3. Step 3: Cross multiply
   3,916.69x = 5,405.14 × 2,238.37
4. Step 4: Simplify right side
   3,916.69x = 12,098,712.78
5. Step 5: Solve for x
   x = 12,098,712.78/3,916.69
6. Step 6: Final answer
   x = 3,089.01