Finding the Fourth Proportional to 1,036.69, 1,554.33 and 542.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.69 : 1,554.33 = 542.79 : x
2. Step 2: Convert to fraction form
   1,036.69/1,554.33 = 542.79/x
3. Step 3: Cross multiply
   1,036.69x = 1,554.33 × 542.79
4. Step 4: Simplify right side
   1,036.69x = 843,674.78
5. Step 5: Solve for x
   x = 843,674.78/1,036.69
6. Step 6: Final answer
   x = 813.82