Finding the Fourth Proportional to 1,318.29, 1,819.23 and 728.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,318.29 : 1,819.23 = 728.83 : x
2. Step 2: Convert to fraction form
   1,318.29/1,819.23 = 728.83/x
3. Step 3: Cross multiply
   1,318.29x = 1,819.23 × 728.83
4. Step 4: Simplify right side
   1,318.29x = 1,325,900.30
5. Step 5: Solve for x
   x = 1,325,900.30/1,318.29
6. Step 6: Final answer
   x = 1,005.78