Finding the Fourth Proportional to 82.72, 113.99 and 67.22

Step by Step Solution

1. Step 1: Write the proportion equation
   82.72 : 113.99 = 67.22 : x
2. Step 2: Convert to fraction form
   82.72/113.99 = 67.22/x
3. Step 3: Cross multiply
   82.72x = 113.99 × 67.22
4. Step 4: Simplify right side
   82.72x = 7,662.41
5. Step 5: Solve for x
   x = 7,662.41/82.72
6. Step 6: Final answer
   x = 92.63