Finding the Fourth Proportional to 2,620.94, 3,616.98 and 1,442.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.94 : 3,616.98 = 1,442.09 : x
2. Step 2: Convert to fraction form
   2,620.94/3,616.98 = 1,442.09/x
3. Step 3: Cross multiply
   2,620.94x = 3,616.98 × 1,442.09
4. Step 4: Simplify right side
   2,620.94x = 5,216,010.69
5. Step 5: Solve for x
   x = 5,216,010.69/2,620.94
6. Step 6: Final answer
   x = 1,990.13