Finding the Fourth Proportional to 82.45, 123.69 and 43.93

Step by Step Solution

1. Step 1: Write the proportion equation
   82.45 : 123.69 = 43.93 : x
2. Step 2: Convert to fraction form
   82.45/123.69 = 43.93/x
3. Step 3: Cross multiply
   82.45x = 123.69 × 43.93
4. Step 4: Simplify right side
   82.45x = 5,433.70
5. Step 5: Solve for x
   x = 5,433.70/82.45
6. Step 6: Final answer
   x = 65.90