Finding the Fourth Proportional to 1,036.40, 1,429.25 and 799.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.40 : 1,429.25 = 799.98 : x
2. Step 2: Convert to fraction form
   1,036.40/1,429.25 = 799.98/x
3. Step 3: Cross multiply
   1,036.40x = 1,429.25 × 799.98
4. Step 4: Simplify right side
   1,036.40x = 1,143,362.06
5. Step 5: Solve for x
   x = 1,143,362.06/1,036.40
6. Step 6: Final answer
   x = 1,103.21