Finding the Fourth Proportional to 2,218.82, 3,330.29 and 1,123.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.82 : 3,330.29 = 1,123.94 : x
2. Step 2: Convert to fraction form
   2,218.82/3,330.29 = 1,123.94/x
3. Step 3: Cross multiply
   2,218.82x = 3,330.29 × 1,123.94
4. Step 4: Simplify right side
   2,218.82x = 3,743,057.28
5. Step 5: Solve for x
   x = 3,743,057.28/2,218.82
6. Step 6: Final answer
   x = 1,686.96