Finding the Fourth Proportional to 111.37, 153.52 and 72.02

Step by Step Solution

1. Step 1: Write the proportion equation
   111.37 : 153.52 = 72.02 : x
2. Step 2: Convert to fraction form
   111.37/153.52 = 72.02/x
3. Step 3: Cross multiply
   111.37x = 153.52 × 72.02
4. Step 4: Simplify right side
   111.37x = 11,056.98
5. Step 5: Solve for x
   x = 11,056.98/111.37
6. Step 6: Final answer
   x = 99.28