Finding the Fourth Proportional to 1,440.73, 1,983.31 and 1,293.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.73 : 1,983.31 = 1,293.31 : x
2. Step 2: Convert to fraction form
   1,440.73/1,983.31 = 1,293.31/x
3. Step 3: Cross multiply
   1,440.73x = 1,983.31 × 1,293.31
4. Step 4: Simplify right side
   1,440.73x = 2,565,034.66
5. Step 5: Solve for x
   x = 2,565,034.66/1,440.73
6. Step 6: Final answer
   x = 1,780.37