Finding the Fourth Proportional to 109.15, 150.58 and 67.69

Step by Step Solution

1. Step 1: Write the proportion equation
   109.15 : 150.58 = 67.69 : x
2. Step 2: Convert to fraction form
   109.15/150.58 = 67.69/x
3. Step 3: Cross multiply
   109.15x = 150.58 × 67.69
4. Step 4: Simplify right side
   109.15x = 10,192.93
5. Step 5: Solve for x
   x = 10,192.93/109.15
6. Step 6: Final answer
   x = 93.38