Finding the Fourth Proportional to 1,150.25, 1,725.37 and 328.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.25 : 1,725.37 = 328.57 : x
2. Step 2: Convert to fraction form
   1,150.25/1,725.37 = 328.57/x
3. Step 3: Cross multiply
   1,150.25x = 1,725.37 × 328.57
4. Step 4: Simplify right side
   1,150.25x = 566,899.69
5. Step 5: Solve for x
   x = 566,899.69/1,150.25
6. Step 6: Final answer
   x = 492.85