Finding the Fourth Proportional to 1,150.72, 1,725.76 and 328.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.72 : 1,725.76 = 328.98 : x
2. Step 2: Convert to fraction form
   1,150.72/1,725.76 = 328.98/x
3. Step 3: Cross multiply
   1,150.72x = 1,725.76 × 328.98
4. Step 4: Simplify right side
   1,150.72x = 567,740.52
5. Step 5: Solve for x
   x = 567,740.52/1,150.72
6. Step 6: Final answer
   x = 493.38