Finding the Fourth Proportional to 82.79, 114.28 and 53.31

Step by Step Solution

1. Step 1: Write the proportion equation
   82.79 : 114.28 = 53.31 : x
2. Step 2: Convert to fraction form
   82.79/114.28 = 53.31/x
3. Step 3: Cross multiply
   82.79x = 114.28 × 53.31
4. Step 4: Simplify right side
   82.79x = 6,092.27
5. Step 5: Solve for x
   x = 6,092.27/82.79
6. Step 6: Final answer
   x = 73.59