Finding the Fourth Proportional to 114.78, 172.25 and 42.69

Step by Step Solution

1. Step 1: Write the proportion equation
   114.78 : 172.25 = 42.69 : x
2. Step 2: Convert to fraction form
   114.78/172.25 = 42.69/x
3. Step 3: Cross multiply
   114.78x = 172.25 × 42.69
4. Step 4: Simplify right side
   114.78x = 7,353.14
5. Step 5: Solve for x
   x = 7,353.14/114.78
6. Step 6: Final answer
   x = 64.06