Finding the Fourth Proportional to 82.69, 123.82 and 69.65

Step by Step Solution

1. Step 1: Write the proportion equation
   82.69 : 123.82 = 69.65 : x
2. Step 2: Convert to fraction form
   82.69/123.82 = 69.65/x
3. Step 3: Cross multiply
   82.69x = 123.82 × 69.65
4. Step 4: Simplify right side
   82.69x = 8,623.10
5. Step 5: Solve for x
   x = 8,623.10/82.69
6. Step 6: Final answer
   x = 104.28