Finding the Fourth Proportional to 114.34, 171.56 and 42.21

Step by Step Solution

1. Step 1: Write the proportion equation
   114.34 : 171.56 = 42.21 : x
2. Step 2: Convert to fraction form
   114.34/171.56 = 42.21/x
3. Step 3: Cross multiply
   114.34x = 171.56 × 42.21
4. Step 4: Simplify right side
   114.34x = 7,241.55
5. Step 5: Solve for x
   x = 7,241.55/114.34
6. Step 6: Final answer
   x = 63.33