Finding the Fourth Proportional to 2,620.80, 3,616.76 and 1,441.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.80 : 3,616.76 = 1,441.98 : x
2. Step 2: Convert to fraction form
   2,620.80/3,616.76 = 1,441.98/x
3. Step 3: Cross multiply
   2,620.80x = 3,616.76 × 1,441.98
4. Step 4: Simplify right side
   2,620.80x = 5,215,295.58
5. Step 5: Solve for x
   x = 5,215,295.58/2,620.80
6. Step 6: Final answer
   x = 1,989.96