Finding the Fourth Proportional to 1,868.50, 2,578.53 and 1,040.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.50 : 2,578.53 = 1,040.50 : x
2. Step 2: Convert to fraction form
   1,868.50/2,578.53 = 1,040.50/x
3. Step 3: Cross multiply
   1,868.50x = 2,578.53 × 1,040.50
4. Step 4: Simplify right side
   1,868.50x = 2,682,960.47
5. Step 5: Solve for x
   x = 2,682,960.47/1,868.50
6. Step 6: Final answer
   x = 1,435.89