Finding the Fourth Proportional to 1,440.62, 1,985.94 and 1,019.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.62 : 1,985.94 = 1,019.67 : x
2. Step 2: Convert to fraction form
   1,440.62/1,985.94 = 1,019.67/x
3. Step 3: Cross multiply
   1,440.62x = 1,985.94 × 1,019.67
4. Step 4: Simplify right side
   1,440.62x = 2,025,003.44
5. Step 5: Solve for x
   x = 2,025,003.44/1,440.62
6. Step 6: Final answer
   x = 1,405.65