Finding the Fourth Proportional to 8,091.58, 12,142.09 and 3,411.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,091.58 : 12,142.09 = 3,411.30 : x
2. Step 2: Convert to fraction form
   8,091.58/12,142.09 = 3,411.30/x
3. Step 3: Cross multiply
   8,091.58x = 12,142.09 × 3,411.30
4. Step 4: Simplify right side
   8,091.58x = 41,420,311.62
5. Step 5: Solve for x
   x = 41,420,311.62/8,091.58
6. Step 6: Final answer
   x = 5,118.94