Finding the Fourth Proportional to 82.90, 123.82 and 69.37

Step by Step Solution

1. Step 1: Write the proportion equation
   82.90 : 123.82 = 69.37 : x
2. Step 2: Convert to fraction form
   82.90/123.82 = 69.37/x
3. Step 3: Cross multiply
   82.90x = 123.82 × 69.37
4. Step 4: Simplify right side
   82.90x = 8,589.39
5. Step 5: Solve for x
   x = 8,589.39/82.90
6. Step 6: Final answer
   x = 103.61