Finding the Fourth Proportional to 3,991.29, 5,508.24 and 2,222.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.29 : 5,508.24 = 2,222.91 : x
2. Step 2: Convert to fraction form
   3,991.29/5,508.24 = 2,222.91/x
3. Step 3: Cross multiply
   3,991.29x = 5,508.24 × 2,222.91
4. Step 4: Simplify right side
   3,991.29x = 12,244,321.78
5. Step 5: Solve for x
   x = 12,244,321.78/3,991.29
6. Step 6: Final answer
   x = 3,067.76