Finding the Fourth Proportional to 2,560.05, 3,533.20 and 1,441.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560.05 : 3,533.20 = 1,441.20 : x
2. Step 2: Convert to fraction form
   2,560.05/3,533.20 = 1,441.20/x
3. Step 3: Cross multiply
   2,560.05x = 3,533.20 × 1,441.20
4. Step 4: Simplify right side
   2,560.05x = 5,092,065.59
5. Step 5: Solve for x
   x = 5,092,065.59/2,560.05
6. Step 6: Final answer
   x = 1,989.05