Finding the Fourth Proportional to 1,078.38, 1,617.98 and 957.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.38 : 1,617.98 = 957.56 : x
2. Step 2: Convert to fraction form
   1,078.38/1,617.98 = 957.56/x
3. Step 3: Cross multiply
   1,078.38x = 1,617.98 × 957.56
4. Step 4: Simplify right side
   1,078.38x = 1,549,300.05
5. Step 5: Solve for x
   x = 1,549,300.05/1,078.38
6. Step 6: Final answer
   x = 1,436.69