Finding the Fourth Proportional to 82.21, 113.41 and 52.69

Step by Step Solution

1. Step 1: Write the proportion equation
   82.21 : 113.41 = 52.69 : x
2. Step 2: Convert to fraction form
   82.21/113.41 = 52.69/x
3. Step 3: Cross multiply
   82.21x = 113.41 × 52.69
4. Step 4: Simplify right side
   82.21x = 5,975.57
5. Step 5: Solve for x
   x = 5,975.57/82.21
6. Step 6: Final answer
   x = 72.69