Finding the Fourth Proportional to 111.93, 154.49 and 65.34

Step by Step Solution

1. Step 1: Write the proportion equation
   111.93 : 154.49 = 65.34 : x
2. Step 2: Convert to fraction form
   111.93/154.49 = 65.34/x
3. Step 3: Cross multiply
   111.93x = 154.49 × 65.34
4. Step 4: Simplify right side
   111.93x = 10,095.34
5. Step 5: Solve for x
   x = 10,095.34/111.93
6. Step 6: Final answer
   x = 90.19