Finding the Fourth Proportional to 2,439.72, 3,658.35 and 1,123.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,439.72 : 3,658.35 = 1,123.08 : x
2. Step 2: Convert to fraction form
   2,439.72/3,658.35 = 1,123.08/x
3. Step 3: Cross multiply
   2,439.72x = 3,658.35 × 1,123.08
4. Step 4: Simplify right side
   2,439.72x = 4,108,619.72
5. Step 5: Solve for x
   x = 4,108,619.72/2,439.72
6. Step 6: Final answer
   x = 1,684.05