Finding the Fourth Proportional to 1,318.10, 1,819.08 and 728.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,318.10 : 1,819.08 = 728.82 : x
2. Step 2: Convert to fraction form
   1,318.10/1,819.08 = 728.82/x
3. Step 3: Cross multiply
   1,318.10x = 1,819.08 × 728.82
4. Step 4: Simplify right side
   1,318.10x = 1,325,781.89
5. Step 5: Solve for x
   x = 1,325,781.89/1,318.10
6. Step 6: Final answer
   x = 1,005.83