Finding the Fourth Proportional to 2,620.67, 3,616.65 and 1,441.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.67 : 3,616.65 = 1,441.71 : x
2. Step 2: Convert to fraction form
   2,620.67/3,616.65 = 1,441.71/x
3. Step 3: Cross multiply
   2,620.67x = 3,616.65 × 1,441.71
4. Step 4: Simplify right side
   2,620.67x = 5,214,160.47
5. Step 5: Solve for x
   x = 5,214,160.47/2,620.67
6. Step 6: Final answer
   x = 1,989.63