Finding the Fourth Proportional to 1,149.03, 1,585.42 and 728.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,149.03 : 1,585.42 = 728.89 : x
2. Step 2: Convert to fraction form
   1,149.03/1,585.42 = 728.89/x
3. Step 3: Cross multiply
   1,149.03x = 1,585.42 × 728.89
4. Step 4: Simplify right side
   1,149.03x = 1,155,585.21
5. Step 5: Solve for x
   x = 1,155,585.21/1,149.03
6. Step 6: Final answer
   x = 1,005.70