Finding the Fourth Proportional to 1,076.88, 1,485.66 and 728.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.88 : 1,485.66 = 728.52 : x
2. Step 2: Convert to fraction form
   1,076.88/1,485.66 = 728.52/x
3. Step 3: Cross multiply
   1,076.88x = 1,485.66 × 728.52
4. Step 4: Simplify right side
   1,076.88x = 1,082,333.02
5. Step 5: Solve for x
   x = 1,082,333.02/1,076.88
6. Step 6: Final answer
   x = 1,005.06