Finding the Fourth Proportional to 1,745.10, 2,406.86 and 1,081.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,745.10 : 2,406.86 = 1,081.57 : x
2. Step 2: Convert to fraction form
   1,745.10/2,406.86 = 1,081.57/x
3. Step 3: Cross multiply
   1,745.10x = 2,406.86 × 1,081.57
4. Step 4: Simplify right side
   1,745.10x = 2,603,187.57
5. Step 5: Solve for x
   x = 2,603,187.57/1,745.10
6. Step 6: Final answer
   x = 1,491.72