Finding the Fourth Proportional to 1,017.78, 1,404.52 and 575.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.78 : 1,404.52 = 575.68 : x
2. Step 2: Convert to fraction form
   1,017.78/1,404.52 = 575.68/x
3. Step 3: Cross multiply
   1,017.78x = 1,404.52 × 575.68
4. Step 4: Simplify right side
   1,017.78x = 808,554.07
5. Step 5: Solve for x
   x = 808,554.07/1,017.78
6. Step 6: Final answer
   x = 794.43