Finding the Fourth Proportional to 82.38, 113.69 and 49.17

Step by Step Solution

1. Step 1: Write the proportion equation
   82.38 : 113.69 = 49.17 : x
2. Step 2: Convert to fraction form
   82.38/113.69 = 49.17/x
3. Step 3: Cross multiply
   82.38x = 113.69 × 49.17
4. Step 4: Simplify right side
   82.38x = 5,589.89
5. Step 5: Solve for x
   x = 5,589.89/82.38
6. Step 6: Final answer
   x = 67.85