Finding the Fourth Proportional to 1,989.69, 2,745.27 and 1,203.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.69 : 2,745.27 = 1,203.59 : x
2. Step 2: Convert to fraction form
   1,989.69/2,745.27 = 1,203.59/x
3. Step 3: Cross multiply
   1,989.69x = 2,745.27 × 1,203.59
4. Step 4: Simplify right side
   1,989.69x = 3,304,179.52
5. Step 5: Solve for x
   x = 3,304,179.52/1,989.69
6. Step 6: Final answer
   x = 1,660.65