Finding the Fourth Proportional to 171.34, 236.55 and 105.82

Step by Step Solution

1. Step 1: Write the proportion equation
   171.34 : 236.55 = 105.82 : x
2. Step 2: Convert to fraction form
   171.34/236.55 = 105.82/x
3. Step 3: Cross multiply
   171.34x = 236.55 × 105.82
4. Step 4: Simplify right side
   171.34x = 25,031.72
5. Step 5: Solve for x
   x = 25,031.72/171.34
6. Step 6: Final answer
   x = 146.09