Finding the Fourth Proportional to 111.40, 153.76 and 67.76

Step by Step Solution

1. Step 1: Write the proportion equation
   111.40 : 153.76 = 67.76 : x
2. Step 2: Convert to fraction form
   111.40/153.76 = 67.76/x
3. Step 3: Cross multiply
   111.40x = 153.76 × 67.76
4. Step 4: Simplify right side
   111.40x = 10,418.78
5. Step 5: Solve for x
   x = 10,418.78/111.40
6. Step 6: Final answer
   x = 93.53