Finding the Fourth Proportional to 127.67, 191.10 and 100.67

Step by Step Solution

1. Step 1: Write the proportion equation
   127.67 : 191.10 = 100.67 : x
2. Step 2: Convert to fraction form
   127.67/191.10 = 100.67/x
3. Step 3: Cross multiply
   127.67x = 191.10 × 100.67
4. Step 4: Simplify right side
   127.67x = 19,238.04
5. Step 5: Solve for x
   x = 19,238.04/127.67
6. Step 6: Final answer
   x = 150.69