Finding the Fourth Proportional to 111.34, 166.84 and 100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111.34 : 166.84 = 100.50 : x
2. Step 2: Convert to fraction form
   111.34/166.84 = 100.50/x
3. Step 3: Cross multiply
   111.34x = 166.84 × 100.50
4. Step 4: Simplify right side
   111.34x = 16,767.42
5. Step 5: Solve for x
   x = 16,767.42/111.34
6. Step 6: Final answer
   x = 150.60