Finding the Fourth Proportional to 82.49, 123.59 and 43.92

Step by Step Solution

1. Step 1: Write the proportion equation
   82.49 : 123.59 = 43.92 : x
2. Step 2: Convert to fraction form
   82.49/123.59 = 43.92/x
3. Step 3: Cross multiply
   82.49x = 123.59 × 43.92
4. Step 4: Simplify right side
   82.49x = 5,428.18
5. Step 5: Solve for x
   x = 5,428.18/82.49
6. Step 6: Final answer
   x = 65.81