Finding the Fourth Proportional to 1,061.00, 1,591.49 and 330.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.00 : 1,591.49 = 330.57 : x
2. Step 2: Convert to fraction form
   1,061.00/1,591.49 = 330.57/x
3. Step 3: Cross multiply
   1,061.00x = 1,591.49 × 330.57
4. Step 4: Simplify right side
   1,061.00x = 526,103.28
5. Step 5: Solve for x
   x = 526,103.28/1,061.00
6. Step 6: Final answer
   x = 495.86