Finding the Fourth Proportional to 1,077.96, 1,485.86 and 728.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.96 : 1,485.86 = 728.04 : x
2. Step 2: Convert to fraction form
   1,077.96/1,485.86 = 728.04/x
3. Step 3: Cross multiply
   1,077.96x = 1,485.86 × 728.04
4. Step 4: Simplify right side
   1,077.96x = 1,081,765.51
5. Step 5: Solve for x
   x = 1,081,765.51/1,077.96
6. Step 6: Final answer
   x = 1,003.53