Finding the Fourth Proportional to 1,061.20, 1,590.58 and 573.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.20 : 1,590.58 = 573.23 : x
2. Step 2: Convert to fraction form
   1,061.20/1,590.58 = 573.23/x
3. Step 3: Cross multiply
   1,061.20x = 1,590.58 × 573.23
4. Step 4: Simplify right side
   1,061.20x = 911,768.17
5. Step 5: Solve for x
   x = 911,768.17/1,061.20
6. Step 6: Final answer
   x = 859.19