Finding the Fourth Proportional to 1,886.69, 2,603.57 and 1,140.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,886.69 : 2,603.57 = 1,140.37 : x
2. Step 2: Convert to fraction form
   1,886.69/2,603.57 = 1,140.37/x
3. Step 3: Cross multiply
   1,886.69x = 2,603.57 × 1,140.37
4. Step 4: Simplify right side
   1,886.69x = 2,969,033.93
5. Step 5: Solve for x
   x = 2,969,033.93/1,886.69
6. Step 6: Final answer
   x = 1,573.67