Finding the Fourth Proportional to 3,991.31, 5,507.87 and 2,222.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.31 : 5,507.87 = 2,222.82 : x
2. Step 2: Convert to fraction form
   3,991.31/5,507.87 = 2,222.82/x
3. Step 3: Cross multiply
   3,991.31x = 5,507.87 × 2,222.82
4. Step 4: Simplify right side
   3,991.31x = 12,242,992.48
5. Step 5: Solve for x
   x = 12,242,992.48/3,991.31
6. Step 6: Final answer
   x = 3,067.42