Finding the Fourth Proportional to 82.41, 123.61 and 34.31

Step by Step Solution

1. Step 1: Write the proportion equation
   82.41 : 123.61 = 34.31 : x
2. Step 2: Convert to fraction form
   82.41/123.61 = 34.31/x
3. Step 3: Cross multiply
   82.41x = 123.61 × 34.31
4. Step 4: Simplify right side
   82.41x = 4,241.06
5. Step 5: Solve for x
   x = 4,241.06/82.41
6. Step 6: Final answer
   x = 51.46