Finding the Fourth Proportional to 114.48, 171.72 and 42.39

Step by Step Solution

1. Step 1: Write the proportion equation
   114.48 : 171.72 = 42.39 : x
2. Step 2: Convert to fraction form
   114.48/171.72 = 42.39/x
3. Step 3: Cross multiply
   114.48x = 171.72 × 42.39
4. Step 4: Simplify right side
   114.48x = 7,279.21
5. Step 5: Solve for x
   x = 7,279.21/114.48
6. Step 6: Final answer
   x = 63.59