Finding the Fourth Proportional to 1,144.43, 1,579.50 and 864.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.43 : 1,579.50 = 864.22 : x
2. Step 2: Convert to fraction form
   1,144.43/1,579.50 = 864.22/x
3. Step 3: Cross multiply
   1,144.43x = 1,579.50 × 864.22
4. Step 4: Simplify right side
   1,144.43x = 1,365,034.50
5. Step 5: Solve for x
   x = 1,365,034.50/1,144.43
6. Step 6: Final answer
   x = 1,192.76