Finding the Fourth Proportional to 12,251.29, 18,378.57 and 3,928.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,251.29 : 18,378.57 = 3,928.54 : x
2. Step 2: Convert to fraction form
   12,251.29/18,378.57 = 3,928.54/x
3. Step 3: Cross multiply
   12,251.29x = 18,378.57 × 3,928.54
4. Step 4: Simplify right side
   12,251.29x = 72,200,947.39
5. Step 5: Solve for x
   x = 72,200,947.39/12,251.29
6. Step 6: Final answer
   x = 5,893.33