Finding the Fourth Proportional to 111.34, 153.66 and 67.71

Step by Step Solution

1. Step 1: Write the proportion equation
   111.34 : 153.66 = 67.71 : x
2. Step 2: Convert to fraction form
   111.34/153.66 = 67.71/x
3. Step 3: Cross multiply
   111.34x = 153.66 × 67.71
4. Step 4: Simplify right side
   111.34x = 10,404.32
5. Step 5: Solve for x
   x = 10,404.32/111.34
6. Step 6: Final answer
   x = 93.45