Finding the Fourth Proportional to 4,123.78, 5,689.46 and 2,355.04

Step by Step Solution

1. Step 1: Write the proportion equation
   4,123.78 : 5,689.46 = 2,355.04 : x
2. Step 2: Convert to fraction form
   4,123.78/5,689.46 = 2,355.04/x
3. Step 3: Cross multiply
   4,123.78x = 5,689.46 × 2,355.04
4. Step 4: Simplify right side
   4,123.78x = 13,398,905.88
5. Step 5: Solve for x
   x = 13,398,905.88/4,123.78
6. Step 6: Final answer
   x = 3,249.18