Finding the Fourth Proportional to 3,934.37, 5,429.37 and 2,255.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,934.37 : 5,429.37 = 2,255.74 : x
2. Step 2: Convert to fraction form
   3,934.37/5,429.37 = 2,255.74/x
3. Step 3: Cross multiply
   3,934.37x = 5,429.37 × 2,255.74
4. Step 4: Simplify right side
   3,934.37x = 12,247,233.51
5. Step 5: Solve for x
   x = 12,247,233.51/3,934.37
6. Step 6: Final answer
   x = 3,112.88