Finding the Fourth Proportional to 1,983.42, 2,976.17 and 1,440.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,983.42 : 2,976.17 = 1,440.09 : x
2. Step 2: Convert to fraction form
   1,983.42/2,976.17 = 1,440.09/x
3. Step 3: Cross multiply
   1,983.42x = 2,976.17 × 1,440.09
4. Step 4: Simplify right side
   1,983.42x = 4,285,945.45
5. Step 5: Solve for x
   x = 4,285,945.45/1,983.42
6. Step 6: Final answer
   x = 2,160.89