Finding the Fourth Proportional to 1,061.01, 1,591.56 and 331.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.01 : 1,591.56 = 331.08 : x
2. Step 2: Convert to fraction form
   1,061.01/1,591.56 = 331.08/x
3. Step 3: Cross multiply
   1,061.01x = 1,591.56 × 331.08
4. Step 4: Simplify right side
   1,061.01x = 526,933.68
5. Step 5: Solve for x
   x = 526,933.68/1,061.01
6. Step 6: Final answer
   x = 496.63