Finding the Fourth Proportional to 82.96, 124.17 and 57.27

Step by Step Solution

1. Step 1: Write the proportion equation
   82.96 : 124.17 = 57.27 : x
2. Step 2: Convert to fraction form
   82.96/124.17 = 57.27/x
3. Step 3: Cross multiply
   82.96x = 124.17 × 57.27
4. Step 4: Simplify right side
   82.96x = 7,111.22
5. Step 5: Solve for x
   x = 7,111.22/82.96
6. Step 6: Final answer
   x = 85.72