Finding the Fourth Proportional to 1,439.16, 1,985.04 and 1,019.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.16 : 1,985.04 = 1,019.46 : x
2. Step 2: Convert to fraction form
   1,439.16/1,985.04 = 1,019.46/x
3. Step 3: Cross multiply
   1,439.16x = 1,985.04 × 1,019.46
4. Step 4: Simplify right side
   1,439.16x = 2,023,668.88
5. Step 5: Solve for x
   x = 2,023,668.88/1,439.16
6. Step 6: Final answer
   x = 1,406.15