Finding the Fourth Proportional to 111.99, 154.48 and 67.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111.99 : 154.48 = 67.72 : x
2. Step 2: Convert to fraction form
   111.99/154.48 = 67.72/x
3. Step 3: Cross multiply
   111.99x = 154.48 × 67.72
4. Step 4: Simplify right side
   111.99x = 10,460.27
5. Step 5: Solve for x
   x = 10,460.27/111.99
6. Step 6: Final answer
   x = 93.40