Finding the Fourth Proportional to 1,989.49, 2,745.50 and 1,105.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.49 : 2,745.50 = 1,105.29 : x
2. Step 2: Convert to fraction form
   1,989.49/2,745.50 = 1,105.29/x
3. Step 3: Cross multiply
   1,989.49x = 2,745.50 × 1,105.29
4. Step 4: Simplify right side
   1,989.49x = 3,034,573.70
5. Step 5: Solve for x
   x = 3,034,573.70/1,989.49
6. Step 6: Final answer
   x = 1,525.30