Finding the Fourth Proportional to 111.32, 153.33 and 103.76

Step by Step Solution

1. Step 1: Write the proportion equation
   111.32 : 153.33 = 103.76 : x
2. Step 2: Convert to fraction form
   111.32/153.33 = 103.76/x
3. Step 3: Cross multiply
   111.32x = 153.33 × 103.76
4. Step 4: Simplify right side
   111.32x = 15,909.52
5. Step 5: Solve for x
   x = 15,909.52/111.32
6. Step 6: Final answer
   x = 142.92