Finding the Fourth Proportional to 1,036.79, 1,554.27 and 550.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.79 : 1,554.27 = 550.18 : x
2. Step 2: Convert to fraction form
   1,036.79/1,554.27 = 550.18/x
3. Step 3: Cross multiply
   1,036.79x = 1,554.27 × 550.18
4. Step 4: Simplify right side
   1,036.79x = 855,128.27
5. Step 5: Solve for x
   x = 855,128.27/1,036.79
6. Step 6: Final answer
   x = 824.78