Finding the Fourth Proportional to 114.86, 172.17 and 42.69

Step by Step Solution

1. Step 1: Write the proportion equation
   114.86 : 172.17 = 42.69 : x
2. Step 2: Convert to fraction form
   114.86/172.17 = 42.69/x
3. Step 3: Cross multiply
   114.86x = 172.17 × 42.69
4. Step 4: Simplify right side
   114.86x = 7,349.94
5. Step 5: Solve for x
   x = 7,349.94/114.86
6. Step 6: Final answer
   x = 63.99