Finding the Fourth Proportional to 2,620.89, 3,616.85 and 1,442.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.89 : 3,616.85 = 1,442.04 : x
2. Step 2: Convert to fraction form
   2,620.89/3,616.85 = 1,442.04/x
3. Step 3: Cross multiply
   2,620.89x = 3,616.85 × 1,442.04
4. Step 4: Simplify right side
   2,620.89x = 5,215,632.42
5. Step 5: Solve for x
   x = 5,215,632.42/2,620.89
6. Step 6: Final answer
   x = 1,990.02