Finding the Fourth Proportional to 90.94, 136.29 and 42.82

Step by Step Solution

1. Step 1: Write the proportion equation
   90.94 : 136.29 = 42.82 : x
2. Step 2: Convert to fraction form
   90.94/136.29 = 42.82/x
3. Step 3: Cross multiply
   90.94x = 136.29 × 42.82
4. Step 4: Simplify right side
   90.94x = 5,835.94
5. Step 5: Solve for x
   x = 5,835.94/90.94
6. Step 6: Final answer
   x = 64.17