Finding the Fourth Proportional to 1,016.72, 1,403.12 and 574.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.72 : 1,403.12 = 574.68 : x
2. Step 2: Convert to fraction form
   1,016.72/1,403.12 = 574.68/x
3. Step 3: Cross multiply
   1,016.72x = 1,403.12 × 574.68
4. Step 4: Simplify right side
   1,016.72x = 806,342.13
5. Step 5: Solve for x
   x = 806,342.13/1,016.72
6. Step 6: Final answer
   x = 793.09