Finding the Fourth Proportional to 111.64, 167.28 and 100.84

Step by Step Solution

1. Step 1: Write the proportion equation
   111.64 : 167.28 = 100.84 : x
2. Step 2: Convert to fraction form
   111.64/167.28 = 100.84/x
3. Step 3: Cross multiply
   111.64x = 167.28 × 100.84
4. Step 4: Simplify right side
   111.64x = 16,868.52
5. Step 5: Solve for x
   x = 16,868.52/111.64
6. Step 6: Final answer
   x = 151.10