Finding the Fourth Proportional to 89.34, 122.95 and 82.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89.34 : 122.95 = 82.50 : x
2. Step 2: Convert to fraction form
   89.34/122.95 = 82.50/x
3. Step 3: Cross multiply
   89.34x = 122.95 × 82.50
4. Step 4: Simplify right side
   89.34x = 10,143.17
5. Step 5: Solve for x
   x = 10,143.17/89.34
6. Step 6: Final answer
   x = 113.53