Finding the Fourth Proportional to 82.72, 114.14 and 71.56

Step by Step Solution

1. Step 1: Write the proportion equation
   82.72 : 114.14 = 71.56 : x
2. Step 2: Convert to fraction form
   82.72/114.14 = 71.56/x
3. Step 3: Cross multiply
   82.72x = 114.14 × 71.56
4. Step 4: Simplify right side
   82.72x = 8,167.86
5. Step 5: Solve for x
   x = 8,167.86/82.72
6. Step 6: Final answer
   x = 98.74