Finding the Fourth Proportional to 1,101.99, 1,520.83 and 728.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.99 : 1,520.83 = 728.33 : x
2. Step 2: Convert to fraction form
   1,101.99/1,520.83 = 728.33/x
3. Step 3: Cross multiply
   1,101.99x = 1,520.83 × 728.33
4. Step 4: Simplify right side
   1,101.99x = 1,107,659.42
5. Step 5: Solve for x
   x = 1,107,659.42/1,101.99
6. Step 6: Final answer
   x = 1,005.14