Finding the Fourth Proportional to 82.09, 123.24 and 43.59

Step by Step Solution

1. Step 1: Write the proportion equation
   82.09 : 123.24 = 43.59 : x
2. Step 2: Convert to fraction form
   82.09/123.24 = 43.59/x
3. Step 3: Cross multiply
   82.09x = 123.24 × 43.59
4. Step 4: Simplify right side
   82.09x = 5,372.03
5. Step 5: Solve for x
   x = 5,372.03/82.09
6. Step 6: Final answer
   x = 65.44