Finding the Fourth Proportional to 103.69, 154.42 and 100.10

Step by Step Solution

1. Step 1: Write the proportion equation
   103.69 : 154.42 = 100.10 : x
2. Step 2: Convert to fraction form
   103.69/154.42 = 100.10/x
3. Step 3: Cross multiply
   103.69x = 154.42 × 100.10
4. Step 4: Simplify right side
   103.69x = 15,457.44
5. Step 5: Solve for x
   x = 15,457.44/103.69
6. Step 6: Final answer
   x = 149.07