Finding the Fourth Proportional to 1,440.46, 1,988.16 and 1,020.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.46 : 1,988.16 = 1,020.37 : x
2. Step 2: Convert to fraction form
   1,440.46/1,988.16 = 1,020.37/x
3. Step 3: Cross multiply
   1,440.46x = 1,988.16 × 1,020.37
4. Step 4: Simplify right side
   1,440.46x = 2,028,658.82
5. Step 5: Solve for x
   x = 2,028,658.82/1,440.46
6. Step 6: Final answer
   x = 1,408.34