Finding the Fourth Proportional to 111.84, 167.61 and 77.33

Step by Step Solution

1. Step 1: Write the proportion equation
   111.84 : 167.61 = 77.33 : x
2. Step 2: Convert to fraction form
   111.84/167.61 = 77.33/x
3. Step 3: Cross multiply
   111.84x = 167.61 × 77.33
4. Step 4: Simplify right side
   111.84x = 12,961.30
5. Step 5: Solve for x
   x = 12,961.30/111.84
6. Step 6: Final answer
   x = 115.89