Finding the Fourth Proportional to 3,917.15, 5,406.05 and 2,238.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,917.15 : 5,406.05 = 2,238.82 : x
2. Step 2: Convert to fraction form
   3,917.15/5,406.05 = 2,238.82/x
3. Step 3: Cross multiply
   3,917.15x = 5,406.05 × 2,238.82
4. Step 4: Simplify right side
   3,917.15x = 12,103,148.15
5. Step 5: Solve for x
   x = 12,103,148.15/3,917.15
6. Step 6: Final answer
   x = 3,089.78