Finding the Fourth Proportional to 1,144.56, 1,579.59 and 957.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.56 : 1,579.59 = 957.72 : x
2. Step 2: Convert to fraction form
   1,144.56/1,579.59 = 957.72/x
3. Step 3: Cross multiply
   1,144.56x = 1,579.59 × 957.72
4. Step 4: Simplify right side
   1,144.56x = 1,512,804.93
5. Step 5: Solve for x
   x = 1,512,804.93/1,144.56
6. Step 6: Final answer
   x = 1,321.73