Finding the Fourth Proportional to 1,989.69, 2,745.86 and 1,105.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.69 : 2,745.86 = 1,105.47 : x
2. Step 2: Convert to fraction form
   1,989.69/2,745.86 = 1,105.47/x
3. Step 3: Cross multiply
   1,989.69x = 2,745.86 × 1,105.47
4. Step 4: Simplify right side
   1,989.69x = 3,035,465.85
5. Step 5: Solve for x
   x = 3,035,465.85/1,989.69
6. Step 6: Final answer
   x = 1,525.60