Finding the Fourth Proportional to 1,989.32, 2,745.27 and 1,105.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.32 : 2,745.27 = 1,105.16 : x
2. Step 2: Convert to fraction form
   1,989.32/2,745.27 = 1,105.16/x
3. Step 3: Cross multiply
   1,989.32x = 2,745.27 × 1,105.16
4. Step 4: Simplify right side
   1,989.32x = 3,033,948.87
5. Step 5: Solve for x
   x = 3,033,948.87/1,989.32
6. Step 6: Final answer
   x = 1,525.12