Finding the Fourth Proportional to 1,689.45, 2,337.83 and 1,440.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689.45 : 2,337.83 = 1,440.37 : x
2. Step 2: Convert to fraction form
   1,689.45/2,337.83 = 1,440.37/x
3. Step 3: Cross multiply
   1,689.45x = 2,337.83 × 1,440.37
4. Step 4: Simplify right side
   1,689.45x = 3,367,340.20
5. Step 5: Solve for x
   x = 3,367,340.20/1,689.45
6. Step 6: Final answer
   x = 1,993.16