Finding the Fourth Proportional to 2,218.56, 3,326.40 and 1,123.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.56 : 3,326.40 = 1,123.44 : x
2. Step 2: Convert to fraction form
   2,218.56/3,326.40 = 1,123.44/x
3. Step 3: Cross multiply
   2,218.56x = 3,326.40 × 1,123.44
4. Step 4: Simplify right side
   2,218.56x = 3,737,010.82
5. Step 5: Solve for x
   x = 3,737,010.82/2,218.56
6. Step 6: Final answer
   x = 1,684.43