Finding the Fourth Proportional to 8,221.12, 12,328.42 and 3,541.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,221.12 : 12,328.42 = 3,541.48 : x
2. Step 2: Convert to fraction form
   8,221.12/12,328.42 = 3,541.48/x
3. Step 3: Cross multiply
   8,221.12x = 12,328.42 × 3,541.48
4. Step 4: Simplify right side
   8,221.12x = 43,660,852.86
5. Step 5: Solve for x
   x = 43,660,852.86/8,221.12
6. Step 6: Final answer
   x = 5,310.82