Finding the Fourth Proportional to 114.72, 172.12 and 42.62

Step by Step Solution

1. Step 1: Write the proportion equation
   114.72 : 172.12 = 42.62 : x
2. Step 2: Convert to fraction form
   114.72/172.12 = 42.62/x
3. Step 3: Cross multiply
   114.72x = 172.12 × 42.62
4. Step 4: Simplify right side
   114.72x = 7,335.75
5. Step 5: Solve for x
   x = 7,335.75/114.72
6. Step 6: Final answer
   x = 63.94