Finding the Fourth Proportional to 89.21, 123.15 and 67.38

Step by Step Solution

1. Step 1: Write the proportion equation
   89.21 : 123.15 = 67.38 : x
2. Step 2: Convert to fraction form
   89.21/123.15 = 67.38/x
3. Step 3: Cross multiply
   89.21x = 123.15 × 67.38
4. Step 4: Simplify right side
   89.21x = 8,297.85
5. Step 5: Solve for x
   x = 8,297.85/89.21
6. Step 6: Final answer
   x = 93.01