Finding the Fourth Proportional to 3,928.52, 5,422.32 and 2,356.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,928.52 : 5,422.32 = 2,356.28 : x
2. Step 2: Convert to fraction form
   3,928.52/5,422.32 = 2,356.28/x
3. Step 3: Cross multiply
   3,928.52x = 5,422.32 × 2,356.28
4. Step 4: Simplify right side
   3,928.52x = 12,776,504.17
5. Step 5: Solve for x
   x = 12,776,504.17/3,928.52
6. Step 6: Final answer
   x = 3,252.24