Finding the Fourth Proportional to 111.93, 154.31 and 72.52

Step by Step Solution

1. Step 1: Write the proportion equation
   111.93 : 154.31 = 72.52 : x
2. Step 2: Convert to fraction form
   111.93/154.31 = 72.52/x
3. Step 3: Cross multiply
   111.93x = 154.31 × 72.52
4. Step 4: Simplify right side
   111.93x = 11,189.79
5. Step 5: Solve for x
   x = 11,189.79/111.93
6. Step 6: Final answer
   x = 99.98