Finding the Fourth Proportional to 1,036.50, 1,431.09 and 726.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.50 : 1,431.09 = 726.42 : x
2. Step 2: Convert to fraction form
   1,036.50/1,431.09 = 726.42/x
3. Step 3: Cross multiply
   1,036.50x = 1,431.09 × 726.42
4. Step 4: Simplify right side
   1,036.50x = 1,039,572.40
5. Step 5: Solve for x
   x = 1,039,572.40/1,036.50
6. Step 6: Final answer
   x = 1,002.96