Finding the Fourth Proportional to 2,505.80, 3,759.78 and 1,045.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.80 : 3,759.78 = 1,045.28 : x
2. Step 2: Convert to fraction form
   2,505.80/3,759.78 = 1,045.28/x
3. Step 3: Cross multiply
   2,505.80x = 3,759.78 × 1,045.28
4. Step 4: Simplify right side
   2,505.80x = 3,930,022.84
5. Step 5: Solve for x
   x = 3,930,022.84/2,505.80
6. Step 6: Final answer
   x = 1,568.37