Finding the Fourth Proportional to 108.56, 149.76 and 67.12

Step by Step Solution

1. Step 1: Write the proportion equation
   108.56 : 149.76 = 67.12 : x
2. Step 2: Convert to fraction form
   108.56/149.76 = 67.12/x
3. Step 3: Cross multiply
   108.56x = 149.76 × 67.12
4. Step 4: Simplify right side
   108.56x = 10,051.89
5. Step 5: Solve for x
   x = 10,051.89/108.56
6. Step 6: Final answer
   x = 92.59