Finding the Fourth Proportional to 111.77, 154.22 and 67.49

Step by Step Solution

1. Step 1: Write the proportion equation
   111.77 : 154.22 = 67.49 : x
2. Step 2: Convert to fraction form
   111.77/154.22 = 67.49/x
3. Step 3: Cross multiply
   111.77x = 154.22 × 67.49
4. Step 4: Simplify right side
   111.77x = 10,408.31
5. Step 5: Solve for x
   x = 10,408.31/111.77
6. Step 6: Final answer
   x = 93.12