Finding the Fourth Proportional to 2,105.52, 2,904.12 and 1,442.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.52 : 2,904.12 = 1,442.40 : x
2. Step 2: Convert to fraction form
   2,105.52/2,904.12 = 1,442.40/x
3. Step 3: Cross multiply
   2,105.52x = 2,904.12 × 1,442.40
4. Step 4: Simplify right side
   2,105.52x = 4,188,902.69
5. Step 5: Solve for x
   x = 4,188,902.69/2,105.52
6. Step 6: Final answer
   x = 1,989.49