Finding the Fourth Proportional to 82.72, 114.16 and 67.12

Step by Step Solution

1. Step 1: Write the proportion equation
   82.72 : 114.16 = 67.12 : x
2. Step 2: Convert to fraction form
   82.72/114.16 = 67.12/x
3. Step 3: Cross multiply
   82.72x = 114.16 × 67.12
4. Step 4: Simplify right side
   82.72x = 7,662.42
5. Step 5: Solve for x
   x = 7,662.42/82.72
6. Step 6: Final answer
   x = 92.63