Finding the Fourth Proportional to 111.94, 154.38 and 73.12

Step by Step Solution

1. Step 1: Write the proportion equation
   111.94 : 154.38 = 73.12 : x
2. Step 2: Convert to fraction form
   111.94/154.38 = 73.12/x
3. Step 3: Cross multiply
   111.94x = 154.38 × 73.12
4. Step 4: Simplify right side
   111.94x = 11,288.27
5. Step 5: Solve for x
   x = 11,288.27/111.94
6. Step 6: Final answer
   x = 100.84