Finding the Fourth Proportional to 154.99, 213.59 and 111.25

Step by Step Solution

1. Step 1: Write the proportion equation
   154.99 : 213.59 = 111.25 : x
2. Step 2: Convert to fraction form
   154.99/213.59 = 111.25/x
3. Step 3: Cross multiply
   154.99x = 213.59 × 111.25
4. Step 4: Simplify right side
   154.99x = 23,761.89
5. Step 5: Solve for x
   x = 23,761.89/154.99
6. Step 6: Final answer
   x = 153.31