Finding the Fourth Proportional to 8,111.16, 12,169.92 and 3,179.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.16 : 12,169.92 = 3,179.96 : x
2. Step 2: Convert to fraction form
   8,111.16/12,169.92 = 3,179.96/x
3. Step 3: Cross multiply
   8,111.16x = 12,169.92 × 3,179.96
4. Step 4: Simplify right side
   8,111.16x = 38,699,797.95
5. Step 5: Solve for x
   x = 38,699,797.95/8,111.16
6. Step 6: Final answer
   x = 4,771.18