Finding the Fourth Proportional to 82.38, 123.63 and 69.69

Step by Step Solution

1. Step 1: Write the proportion equation
   82.38 : 123.63 = 69.69 : x
2. Step 2: Convert to fraction form
   82.38/123.63 = 69.69/x
3. Step 3: Cross multiply
   82.38x = 123.63 × 69.69
4. Step 4: Simplify right side
   82.38x = 8,615.77
5. Step 5: Solve for x
   x = 8,615.77/82.38
6. Step 6: Final answer
   x = 104.59