Finding the Fourth Proportional to 111.94, 154.52 and 70.57

Step by Step Solution

1. Step 1: Write the proportion equation
   111.94 : 154.52 = 70.57 : x
2. Step 2: Convert to fraction form
   111.94/154.52 = 70.57/x
3. Step 3: Cross multiply
   111.94x = 154.52 × 70.57
4. Step 4: Simplify right side
   111.94x = 10,904.48
5. Step 5: Solve for x
   x = 10,904.48/111.94
6. Step 6: Final answer
   x = 97.41