Finding the Fourth Proportional to 111.51, 153.88 and 67.84

Step by Step Solution

1. Step 1: Write the proportion equation
   111.51 : 153.88 = 67.84 : x
2. Step 2: Convert to fraction form
   111.51/153.88 = 67.84/x
3. Step 3: Cross multiply
   111.51x = 153.88 × 67.84
4. Step 4: Simplify right side
   111.51x = 10,438.66
5. Step 5: Solve for x
   x = 10,438.66/111.51
6. Step 6: Final answer
   x = 93.61