Finding the Fourth Proportional to 1,989.59, 2,745.61 and 1,105.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.59 : 2,745.61 = 1,105.37 : x
2. Step 2: Convert to fraction form
   1,989.59/2,745.61 = 1,105.37/x
3. Step 3: Cross multiply
   1,989.59x = 2,745.61 × 1,105.37
4. Step 4: Simplify right side
   1,989.59x = 3,034,908.73
5. Step 5: Solve for x
   x = 3,034,908.73/1,989.59
6. Step 6: Final answer
   x = 1,525.40