Finding the Fourth Proportional to 2,620.94, 3,616.80 and 1,442.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.94 : 3,616.80 = 1,442.00 : x
2. Step 2: Convert to fraction form
   2,620.94/3,616.80 = 1,442.00/x
3. Step 3: Cross multiply
   2,620.94x = 3,616.80 × 1,442.00
4. Step 4: Simplify right side
   2,620.94x = 5,215,407.52
5. Step 5: Solve for x
   x = 5,215,407.52/2,620.94
6. Step 6: Final answer
   x = 1,989.90