Finding the Fourth Proportional to 111.19, 166.71 and 65.48

Step by Step Solution

1. Step 1: Write the proportion equation
   111.19 : 166.71 = 65.48 : x
2. Step 2: Convert to fraction form
   111.19/166.71 = 65.48/x
3. Step 3: Cross multiply
   111.19x = 166.71 × 65.48
4. Step 4: Simplify right side
   111.19x = 10,915.21
5. Step 5: Solve for x
   x = 10,915.21/111.19
6. Step 6: Final answer
   x = 98.17