Finding the Fourth Proportional to 1,131.20, 1,693.72 and 582.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.20 : 1,693.72 = 582.22 : x
2. Step 2: Convert to fraction form
   1,131.20/1,693.72 = 582.22/x
3. Step 3: Cross multiply
   1,131.20x = 1,693.72 × 582.22
4. Step 4: Simplify right side
   1,131.20x = 986,124.59
5. Step 5: Solve for x
   x = 986,124.59/1,131.20
6. Step 6: Final answer
   x = 871.75