Finding the Fourth Proportional to 1,036.42, 1,429.98 and 721.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.42 : 1,429.98 = 721.33 : x
2. Step 2: Convert to fraction form
   1,036.42/1,429.98 = 721.33/x
3. Step 3: Cross multiply
   1,036.42x = 1,429.98 × 721.33
4. Step 4: Simplify right side
   1,036.42x = 1,031,491.05
5. Step 5: Solve for x
   x = 1,031,491.05/1,036.42
6. Step 6: Final answer
   x = 995.24