Finding the Fourth Proportional to 1,989.56, 2,745.58 and 1,105.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.56 : 2,745.58 = 1,105.36 : x
2. Step 2: Convert to fraction form
   1,989.56/2,745.58 = 1,105.36/x
3. Step 3: Cross multiply
   1,989.56x = 2,745.58 × 1,105.36
4. Step 4: Simplify right side
   1,989.56x = 3,034,854.31
5. Step 5: Solve for x
   x = 3,034,854.31/1,989.56
6. Step 6: Final answer
   x = 1,525.39