Finding the Fourth Proportional to 82.86, 114.32 and 53.72

Step by Step Solution

1. Step 1: Write the proportion equation
   82.86 : 114.32 = 53.72 : x
2. Step 2: Convert to fraction form
   82.86/114.32 = 53.72/x
3. Step 3: Cross multiply
   82.86x = 114.32 × 53.72
4. Step 4: Simplify right side
   82.86x = 6,141.27
5. Step 5: Solve for x
   x = 6,141.27/82.86
6. Step 6: Final answer
   x = 74.12