Finding the Fourth Proportional to 1,439.41, 1,984.28 and 1,018.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.41 : 1,984.28 = 1,018.47 : x
2. Step 2: Convert to fraction form
   1,439.41/1,984.28 = 1,018.47/x
3. Step 3: Cross multiply
   1,439.41x = 1,984.28 × 1,018.47
4. Step 4: Simplify right side
   1,439.41x = 2,020,929.65
5. Step 5: Solve for x
   x = 2,020,929.65/1,439.41
6. Step 6: Final answer
   x = 1,404.00