Finding the Fourth Proportional to 90.18, 135.18 and 32.37

Step by Step Solution

1. Step 1: Write the proportion equation
   90.18 : 135.18 = 32.37 : x
2. Step 2: Convert to fraction form
   90.18/135.18 = 32.37/x
3. Step 3: Cross multiply
   90.18x = 135.18 × 32.37
4. Step 4: Simplify right side
   90.18x = 4,375.78
5. Step 5: Solve for x
   x = 4,375.78/90.18
6. Step 6: Final answer
   x = 48.52