Finding the Fourth Proportional to 1,989.25, 2,745.24 and 1,105.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.25 : 2,745.24 = 1,105.05 : x
2. Step 2: Convert to fraction form
   1,989.25/2,745.24 = 1,105.05/x
3. Step 3: Cross multiply
   1,989.25x = 2,745.24 × 1,105.05
4. Step 4: Simplify right side
   1,989.25x = 3,033,627.46
5. Step 5: Solve for x
   x = 3,033,627.46/1,989.25
6. Step 6: Final answer
   x = 1,525.01