Finding the Fourth Proportional to 3,901.92, 5,382.18 and 2,388.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,901.92 : 5,382.18 = 2,388.78 : x
2. Step 2: Convert to fraction form
   3,901.92/5,382.18 = 2,388.78/x
3. Step 3: Cross multiply
   3,901.92x = 5,382.18 × 2,388.78
4. Step 4: Simplify right side
   3,901.92x = 12,856,843.94
5. Step 5: Solve for x
   x = 12,856,843.94/3,901.92
6. Step 6: Final answer
   x = 3,295.00