Finding the Fourth Proportional to 82.38, 123.42 and 67.92

Step by Step Solution

1. Step 1: Write the proportion equation
   82.38 : 123.42 = 67.92 : x
2. Step 2: Convert to fraction form
   82.38/123.42 = 67.92/x
3. Step 3: Cross multiply
   82.38x = 123.42 × 67.92
4. Step 4: Simplify right side
   82.38x = 8,382.69
5. Step 5: Solve for x
   x = 8,382.69/82.38
6. Step 6: Final answer
   x = 101.76