Finding the Fourth Proportional to 1,989.48, 2,745.83 and 1,150.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.48 : 2,745.83 = 1,150.05 : x
2. Step 2: Convert to fraction form
   1,989.48/2,745.83 = 1,150.05/x
3. Step 3: Cross multiply
   1,989.48x = 2,745.83 × 1,150.05
4. Step 4: Simplify right side
   1,989.48x = 3,157,839.52
5. Step 5: Solve for x
   x = 3,157,839.52/1,989.48
6. Step 6: Final answer
   x = 1,587.27