Finding the Fourth Proportional to 90.72, 136.04 and 32.96

Step by Step Solution

1. Step 1: Write the proportion equation
   90.72 : 136.04 = 32.96 : x
2. Step 2: Convert to fraction form
   90.72/136.04 = 32.96/x
3. Step 3: Cross multiply
   90.72x = 136.04 × 32.96
4. Step 4: Simplify right side
   90.72x = 4,483.03
5. Step 5: Solve for x
   x = 4,483.03/90.72
6. Step 6: Final answer
   x = 49.42