Finding the Fourth Proportional to 90.18, 124.34 and 83.23

Step by Step Solution

1. Step 1: Write the proportion equation
   90.18 : 124.34 = 83.23 : x
2. Step 2: Convert to fraction form
   90.18/124.34 = 83.23/x
3. Step 3: Cross multiply
   90.18x = 124.34 × 83.23
4. Step 4: Simplify right side
   90.18x = 10,348.09
5. Step 5: Solve for x
   x = 10,348.09/90.18
6. Step 6: Final answer
   x = 114.75