Finding the Fourth Proportional to 111.94, 167.93 and 99.88

Step by Step Solution

1. Step 1: Write the proportion equation
   111.94 : 167.93 = 99.88 : x
2. Step 2: Convert to fraction form
   111.94/167.93 = 99.88/x
3. Step 3: Cross multiply
   111.94x = 167.93 × 99.88
4. Step 4: Simplify right side
   111.94x = 16,772.85
5. Step 5: Solve for x
   x = 16,772.85/111.94
6. Step 6: Final answer
   x = 149.84