Finding the Fourth Proportional to 1,989.62, 2,745.72 and 1,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.62 : 2,745.72 = 1,105.50 : x
2. Step 2: Convert to fraction form
   1,989.62/2,745.72 = 1,105.50/x
3. Step 3: Cross multiply
   1,989.62x = 2,745.72 × 1,105.50
4. Step 4: Simplify right side
   1,989.62x = 3,035,393.46
5. Step 5: Solve for x
   x = 3,035,393.46/1,989.62
6. Step 6: Final answer
   x = 1,525.61