Finding the Fourth Proportional to 2,218.52, 3,326.52 and 919.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.52 : 3,326.52 = 919.28 : x
2. Step 2: Convert to fraction form
   2,218.52/3,326.52 = 919.28/x
3. Step 3: Cross multiply
   2,218.52x = 3,326.52 × 919.28
4. Step 4: Simplify right side
   2,218.52x = 3,058,003.31
5. Step 5: Solve for x
   x = 3,058,003.31/2,218.52
6. Step 6: Final answer
   x = 1,378.40