Finding the Fourth Proportional to 111.58, 153.94 and 67.92

Step by Step Solution

1. Step 1: Write the proportion equation
   111.58 : 153.94 = 67.92 : x
2. Step 2: Convert to fraction form
   111.58/153.94 = 67.92/x
3. Step 3: Cross multiply
   111.58x = 153.94 × 67.92
4. Step 4: Simplify right side
   111.58x = 10,455.60
5. Step 5: Solve for x
   x = 10,455.60/111.58
6. Step 6: Final answer
   x = 93.71