Finding the Fourth Proportional to 1,017.87, 1,404.72 and 575.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.87 : 1,404.72 = 575.81 : x
2. Step 2: Convert to fraction form
   1,017.87/1,404.72 = 575.81/x
3. Step 3: Cross multiply
   1,017.87x = 1,404.72 × 575.81
4. Step 4: Simplify right side
   1,017.87x = 808,841.92
5. Step 5: Solve for x
   x = 808,841.92/1,017.87
6. Step 6: Final answer
   x = 794.65