Finding the Fourth Proportional to 111.28, 153.56 and 69.84

Step by Step Solution

1. Step 1: Write the proportion equation
   111.28 : 153.56 = 69.84 : x
2. Step 2: Convert to fraction form
   111.28/153.56 = 69.84/x
3. Step 3: Cross multiply
   111.28x = 153.56 × 69.84
4. Step 4: Simplify right side
   111.28x = 10,724.63
5. Step 5: Solve for x
   x = 10,724.63/111.28
6. Step 6: Final answer
   x = 96.38