Finding the Fourth Proportional to 90.05, 123.98 and 82.62

Step by Step Solution

1. Step 1: Write the proportion equation
   90.05 : 123.98 = 82.62 : x
2. Step 2: Convert to fraction form
   90.05/123.98 = 82.62/x
3. Step 3: Cross multiply
   90.05x = 123.98 × 82.62
4. Step 4: Simplify right side
   90.05x = 10,242.81
5. Step 5: Solve for x
   x = 10,242.81/90.05
6. Step 6: Final answer
   x = 113.75