Finding the Fourth Proportional to 1,061.22, 1,590.12 and 574.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.22 : 1,590.12 = 574.50 : x
2. Step 2: Convert to fraction form
   1,061.22/1,590.12 = 574.50/x
3. Step 3: Cross multiply
   1,061.22x = 1,590.12 × 574.50
4. Step 4: Simplify right side
   1,061.22x = 913,523.94
5. Step 5: Solve for x
   x = 913,523.94/1,061.22
6. Step 6: Final answer
   x = 860.82