Finding the Fourth Proportional to 82.18, 123.50 and 49.69

Step by Step Solution

1. Step 1: Write the proportion equation
   82.18 : 123.50 = 49.69 : x
2. Step 2: Convert to fraction form
   82.18/123.50 = 49.69/x
3. Step 3: Cross multiply
   82.18x = 123.50 × 49.69
4. Step 4: Simplify right side
   82.18x = 6,136.72
5. Step 5: Solve for x
   x = 6,136.72/82.18
6. Step 6: Final answer
   x = 74.67