Finding the Fourth Proportional to 1,539.91, 2,137.61 and 1,442.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,539.91 : 2,137.61 = 1,442.71 : x
2. Step 2: Convert to fraction form
   1,539.91/2,137.61 = 1,442.71/x
3. Step 3: Cross multiply
   1,539.91x = 2,137.61 × 1,442.71
4. Step 4: Simplify right side
   1,539.91x = 3,083,951.32
5. Step 5: Solve for x
   x = 3,083,951.32/1,539.91
6. Step 6: Final answer
   x = 2,002.68