Finding the Fourth Proportional to 3,918.98, 5,407.83 and 2,150.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,918.98 : 5,407.83 = 2,150.54 : x
2. Step 2: Convert to fraction form
   3,918.98/5,407.83 = 2,150.54/x
3. Step 3: Cross multiply
   3,918.98x = 5,407.83 × 2,150.54
4. Step 4: Simplify right side
   3,918.98x = 11,629,754.73
5. Step 5: Solve for x
   x = 11,629,754.73/3,918.98
6. Step 6: Final answer
   x = 2,967.55