Finding the Fourth Proportional to 3,991.11, 5,507.78 and 2,222.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.11 : 5,507.78 = 2,222.82 : x
2. Step 2: Convert to fraction form
   3,991.11/5,507.78 = 2,222.82/x
3. Step 3: Cross multiply
   3,991.11x = 5,507.78 × 2,222.82
4. Step 4: Simplify right side
   3,991.11x = 12,242,792.43
5. Step 5: Solve for x
   x = 12,242,792.43/3,991.11
6. Step 6: Final answer
   x = 3,067.52