Finding the Fourth Proportional to 111.30, 153.78 and 110.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111.30 : 153.78 = 110.50 : x
2. Step 2: Convert to fraction form
   111.30/153.78 = 110.50/x
3. Step 3: Cross multiply
   111.30x = 153.78 × 110.50
4. Step 4: Simplify right side
   111.30x = 16,992.69
5. Step 5: Solve for x
   x = 16,992.69/111.30
6. Step 6: Final answer
   x = 152.67