Finding the Fourth Proportional to 111.52, 153.94 and 72.76

Step by Step Solution

1. Step 1: Write the proportion equation
   111.52 : 153.94 = 72.76 : x
2. Step 2: Convert to fraction form
   111.52/153.94 = 72.76/x
3. Step 3: Cross multiply
   111.52x = 153.94 × 72.76
4. Step 4: Simplify right side
   111.52x = 11,200.67
5. Step 5: Solve for x
   x = 11,200.67/111.52
6. Step 6: Final answer
   x = 100.44