Finding the Fourth Proportional to 6,394.36, 8,828.56 and 4,005.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,394.36 : 8,828.56 = 4,005.31 : x
2. Step 2: Convert to fraction form
   6,394.36/8,828.56 = 4,005.31/x
3. Step 3: Cross multiply
   6,394.36x = 8,828.56 × 4,005.31
4. Step 4: Simplify right side
   6,394.36x = 35,361,155.27
5. Step 5: Solve for x
   x = 35,361,155.27/6,394.36
6. Step 6: Final answer
   x = 5,530.06