Finding the Fourth Proportional to 8,148.24, 12,215.16 and 3,528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,148.24 : 12,215.16 = 3,528.72 : x
2. Step 2: Convert to fraction form
   8,148.24/12,215.16 = 3,528.72/x
3. Step 3: Cross multiply
   8,148.24x = 12,215.16 × 3,528.72
4. Step 4: Simplify right side
   8,148.24x = 43,103,879.40
5. Step 5: Solve for x
   x = 43,103,879.40/8,148.24
6. Step 6: Final answer
   x = 5,289.96