Finding the Fourth Proportional to 111.40, 153.77 and 69.98

Step by Step Solution

1. Step 1: Write the proportion equation
   111.40 : 153.77 = 69.98 : x
2. Step 2: Convert to fraction form
   111.40/153.77 = 69.98/x
3. Step 3: Cross multiply
   111.40x = 153.77 × 69.98
4. Step 4: Simplify right side
   111.40x = 10,760.51
5. Step 5: Solve for x
   x = 10,760.51/111.40
6. Step 6: Final answer
   x = 96.59