Finding the Fourth Proportional to 1,061.14, 1,591.31 and 330.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.14 : 1,591.31 = 330.48 : x
2. Step 2: Convert to fraction form
   1,061.14/1,591.31 = 330.48/x
3. Step 3: Cross multiply
   1,061.14x = 1,591.31 × 330.48
4. Step 4: Simplify right side
   1,061.14x = 525,886.52
5. Step 5: Solve for x
   x = 525,886.52/1,061.14
6. Step 6: Final answer
   x = 495.59