Finding the Fourth Proportional to 2,620.88, 3,616.82 and 1,442.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.88 : 3,616.82 = 1,442.03 : x
2. Step 2: Convert to fraction form
   2,620.88/3,616.82 = 1,442.03/x
3. Step 3: Cross multiply
   2,620.88x = 3,616.82 × 1,442.03
4. Step 4: Simplify right side
   2,620.88x = 5,215,543.06
5. Step 5: Solve for x
   x = 5,215,543.06/2,620.88
6. Step 6: Final answer
   x = 1,990.00