Finding the Fourth Proportional to 82.01, 122.82 and 47.69

Step by Step Solution

1. Step 1: Write the proportion equation
   82.01 : 122.82 = 47.69 : x
2. Step 2: Convert to fraction form
   82.01/122.82 = 47.69/x
3. Step 3: Cross multiply
   82.01x = 122.82 × 47.69
4. Step 4: Simplify right side
   82.01x = 5,856.95
5. Step 5: Solve for x
   x = 5,856.95/82.01
6. Step 6: Final answer
   x = 71.42