Finding the Fourth Proportional to 2,620.69, 3,616.56 and 1,441.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.69 : 3,616.56 = 1,441.78 : x
2. Step 2: Convert to fraction form
   2,620.69/3,616.56 = 1,441.78/x
3. Step 3: Cross multiply
   2,620.69x = 3,616.56 × 1,441.78
4. Step 4: Simplify right side
   2,620.69x = 5,214,274.84
5. Step 5: Solve for x
   x = 5,214,274.84/2,620.69
6. Step 6: Final answer
   x = 1,989.66