Finding the Fourth Proportional to 1,019.25, 1,527.56 and 579.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.25 : 1,527.56 = 579.83 : x
2. Step 2: Convert to fraction form
   1,019.25/1,527.56 = 579.83/x
3. Step 3: Cross multiply
   1,019.25x = 1,527.56 × 579.83
4. Step 4: Simplify right side
   1,019.25x = 885,716.75
5. Step 5: Solve for x
   x = 885,716.75/1,019.25
6. Step 6: Final answer
   x = 868.99