Finding the Fourth Proportional to 1,989.81, 2,745.98 and 1,105.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.81 : 2,745.98 = 1,105.69 : x
2. Step 2: Convert to fraction form
   1,989.81/2,745.98 = 1,105.69/x
3. Step 3: Cross multiply
   1,989.81x = 2,745.98 × 1,105.69
4. Step 4: Simplify right side
   1,989.81x = 3,036,202.63
5. Step 5: Solve for x
   x = 3,036,202.63/1,989.81
6. Step 6: Final answer
   x = 1,525.88