Finding the Fourth Proportional to 1,150.42, 1,725.89 and 328.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.42 : 1,725.89 = 328.76 : x
2. Step 2: Convert to fraction form
   1,150.42/1,725.89 = 328.76/x
3. Step 3: Cross multiply
   1,150.42x = 1,725.89 × 328.76
4. Step 4: Simplify right side
   1,150.42x = 567,403.60
5. Step 5: Solve for x
   x = 567,403.60/1,150.42
6. Step 6: Final answer
   x = 493.21