Finding the Fourth Proportional to 111.09, 153.33 and 67.45

Step by Step Solution

1. Step 1: Write the proportion equation
   111.09 : 153.33 = 67.45 : x
2. Step 2: Convert to fraction form
   111.09/153.33 = 67.45/x
3. Step 3: Cross multiply
   111.09x = 153.33 × 67.45
4. Step 4: Simplify right side
   111.09x = 10,342.11
5. Step 5: Solve for x
   x = 10,342.11/111.09
6. Step 6: Final answer
   x = 93.10