Finding the Fourth Proportional to 111.34, 153.64 and 72.52

Step by Step Solution

1. Step 1: Write the proportion equation
   111.34 : 153.64 = 72.52 : x
2. Step 2: Convert to fraction form
   111.34/153.64 = 72.52/x
3. Step 3: Cross multiply
   111.34x = 153.64 × 72.52
4. Step 4: Simplify right side
   111.34x = 11,141.97
5. Step 5: Solve for x
   x = 11,141.97/111.34
6. Step 6: Final answer
   x = 100.07