Finding the Fourth Proportional to 111.31, 153.60 and 67.07

Step by Step Solution

1. Step 1: Write the proportion equation
   111.31 : 153.60 = 67.07 : x
2. Step 2: Convert to fraction form
   111.31/153.60 = 67.07/x
3. Step 3: Cross multiply
   111.31x = 153.60 × 67.07
4. Step 4: Simplify right side
   111.31x = 10,302.08
5. Step 5: Solve for x
   x = 10,302.08/111.31
6. Step 6: Final answer
   x = 92.56