Finding the Fourth Proportional to 1,016.82, 1,524.60 and 691.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.82 : 1,524.60 = 691.20 : x
2. Step 2: Convert to fraction form
   1,016.82/1,524.60 = 691.20/x
3. Step 3: Cross multiply
   1,016.82x = 1,524.60 × 691.20
4. Step 4: Simplify right side
   1,016.82x = 1,053,803.52
5. Step 5: Solve for x
   x = 1,053,803.52/1,016.82
6. Step 6: Final answer
   x = 1,036.37