Finding the Fourth Proportional to 1,144.31, 1,579.25 and 957.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.31 : 1,579.25 = 957.47 : x
2. Step 2: Convert to fraction form
   1,144.31/1,579.25 = 957.47/x
3. Step 3: Cross multiply
   1,144.31x = 1,579.25 × 957.47
4. Step 4: Simplify right side
   1,144.31x = 1,512,084.50
5. Step 5: Solve for x
   x = 1,512,084.50/1,144.31
6. Step 6: Final answer
   x = 1,321.39