Finding the Fourth Proportional to 111.82, 154.31 and 73.07

Step by Step Solution

1. Step 1: Write the proportion equation
   111.82 : 154.31 = 73.07 : x
2. Step 2: Convert to fraction form
   111.82/154.31 = 73.07/x
3. Step 3: Cross multiply
   111.82x = 154.31 × 73.07
4. Step 4: Simplify right side
   111.82x = 11,275.43
5. Step 5: Solve for x
   x = 11,275.43/111.82
6. Step 6: Final answer
   x = 100.84