Finding the Fourth Proportional to 290.82, 401.33 and 159.82

Step by Step Solution

1. Step 1: Write the proportion equation
   290.82 : 401.33 = 159.82 : x
2. Step 2: Convert to fraction form
   290.82/401.33 = 159.82/x
3. Step 3: Cross multiply
   290.82x = 401.33 × 159.82
4. Step 4: Simplify right side
   290.82x = 64,139.76
5. Step 5: Solve for x
   x = 64,139.76/290.82
6. Step 6: Final answer
   x = 220.55