Finding the Fourth Proportional to 1,989.58, 2,745.57 and 1,105.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.58 : 2,745.57 = 1,105.46 : x
2. Step 2: Convert to fraction form
   1,989.58/2,745.57 = 1,105.46/x
3. Step 3: Cross multiply
   1,989.58x = 2,745.57 × 1,105.46
4. Step 4: Simplify right side
   1,989.58x = 3,035,117.81
5. Step 5: Solve for x
   x = 3,035,117.81/1,989.58
6. Step 6: Final answer
   x = 1,525.51