Finding the Fourth Proportional to 1,150.43, 1,725.91 and 328.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.43 : 1,725.91 = 328.72 : x
2. Step 2: Convert to fraction form
   1,150.43/1,725.91 = 328.72/x
3. Step 3: Cross multiply
   1,150.43x = 1,725.91 × 328.72
4. Step 4: Simplify right side
   1,150.43x = 567,332.51
5. Step 5: Solve for x
   x = 567,332.51/1,150.43
6. Step 6: Final answer
   x = 493.15