Finding the Fourth Proportional to 111.71, 167.41 and 71.01

Step by Step Solution

1. Step 1: Write the proportion equation
   111.71 : 167.41 = 71.01 : x
2. Step 2: Convert to fraction form
   111.71/167.41 = 71.01/x
3. Step 3: Cross multiply
   111.71x = 167.41 × 71.01
4. Step 4: Simplify right side
   111.71x = 11,887.78
5. Step 5: Solve for x
   x = 11,887.78/111.71
6. Step 6: Final answer
   x = 106.42