Finding the Fourth Proportional to 90.32, 134.89 and 74.82

Step by Step Solution

1. Step 1: Write the proportion equation
   90.32 : 134.89 = 74.82 : x
2. Step 2: Convert to fraction form
   90.32/134.89 = 74.82/x
3. Step 3: Cross multiply
   90.32x = 134.89 × 74.82
4. Step 4: Simplify right side
   90.32x = 10,093.00
5. Step 5: Solve for x
   x = 10,093.00/90.32
6. Step 6: Final answer
   x = 111.75