Finding the Fourth Proportional to 111.39, 153.67 and 67.71

Step by Step Solution

1. Step 1: Write the proportion equation
   111.39 : 153.67 = 67.71 : x
2. Step 2: Convert to fraction form
   111.39/153.67 = 67.71/x
3. Step 3: Cross multiply
   111.39x = 153.67 × 67.71
4. Step 4: Simplify right side
   111.39x = 10,405.00
5. Step 5: Solve for x
   x = 10,405.00/111.39
6. Step 6: Final answer
   x = 93.41