Finding the Fourth Proportional to 3,991.06, 5,507.52 and 2,222.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.06 : 5,507.52 = 2,222.57 : x
2. Step 2: Convert to fraction form
   3,991.06/5,507.52 = 2,222.57/x
3. Step 3: Cross multiply
   3,991.06x = 5,507.52 × 2,222.57
4. Step 4: Simplify right side
   3,991.06x = 12,240,848.73
5. Step 5: Solve for x
   x = 12,240,848.73/3,991.06
6. Step 6: Final answer
   x = 3,067.07