Finding the Fourth Proportional to 82.84, 114.43 and 78.79

Step by Step Solution

1. Step 1: Write the proportion equation
   82.84 : 114.43 = 78.79 : x
2. Step 2: Convert to fraction form
   82.84/114.43 = 78.79/x
3. Step 3: Cross multiply
   82.84x = 114.43 × 78.79
4. Step 4: Simplify right side
   82.84x = 9,015.94
5. Step 5: Solve for x
   x = 9,015.94/82.84
6. Step 6: Final answer
   x = 108.84