Finding the Fourth Proportional to 3,918.89, 5,408.01 and 2,150.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,918.89 : 5,408.01 = 2,150.49 : x
2. Step 2: Convert to fraction form
   3,918.89/5,408.01 = 2,150.49/x
3. Step 3: Cross multiply
   3,918.89x = 5,408.01 × 2,150.49
4. Step 4: Simplify right side
   3,918.89x = 11,629,871.42
5. Step 5: Solve for x
   x = 11,629,871.42/3,918.89
6. Step 6: Final answer
   x = 2,967.65