Finding the Fourth Proportional to 3,991.01, 5,507.73 and 2,222.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.01 : 5,507.73 = 2,222.78 : x
2. Step 2: Convert to fraction form
   3,991.01/5,507.73 = 2,222.78/x
3. Step 3: Cross multiply
   3,991.01x = 5,507.73 × 2,222.78
4. Step 4: Simplify right side
   3,991.01x = 12,242,444.55
5. Step 5: Solve for x
   x = 12,242,444.55/3,991.01
6. Step 6: Final answer
   x = 3,067.51