Finding the Fourth Proportional to 82.07, 123.12 and 43.56

Step by Step Solution

1. Step 1: Write the proportion equation
   82.07 : 123.12 = 43.56 : x
2. Step 2: Convert to fraction form
   82.07/123.12 = 43.56/x
3. Step 3: Cross multiply
   82.07x = 123.12 × 43.56
4. Step 4: Simplify right side
   82.07x = 5,363.45
5. Step 5: Solve for x
   x = 5,363.45/82.07
6. Step 6: Final answer
   x = 65.35