Finding the Fourth Proportional to 82.42, 123.56 and 43.87

Step by Step Solution

1. Step 1: Write the proportion equation
   82.42 : 123.56 = 43.87 : x
2. Step 2: Convert to fraction form
   82.42/123.56 = 43.87/x
3. Step 3: Cross multiply
   82.42x = 123.56 × 43.87
4. Step 4: Simplify right side
   82.42x = 5,420.28
5. Step 5: Solve for x
   x = 5,420.28/82.42
6. Step 6: Final answer
   x = 65.77