Finding the Fourth Proportional to 2,620.80, 3,616.68 and 1,441.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.80 : 3,616.68 = 1,441.86 : x
2. Step 2: Convert to fraction form
   2,620.80/3,616.68 = 1,441.86/x
3. Step 3: Cross multiply
   2,620.80x = 3,616.68 × 1,441.86
4. Step 4: Simplify right side
   2,620.80x = 5,214,746.22
5. Step 5: Solve for x
   x = 5,214,746.22/2,620.80
6. Step 6: Final answer
   x = 1,989.75