Finding the Fourth Proportional to 82.17, 123.29 and 47.94

Step by Step Solution

1. Step 1: Write the proportion equation
   82.17 : 123.29 = 47.94 : x
2. Step 2: Convert to fraction form
   82.17/123.29 = 47.94/x
3. Step 3: Cross multiply
   82.17x = 123.29 × 47.94
4. Step 4: Simplify right side
   82.17x = 5,910.28
5. Step 5: Solve for x
   x = 5,910.28/82.17
6. Step 6: Final answer
   x = 71.93