Finding the Fourth Proportional to 67.10, 100.55 and 30.49

Step by Step Solution

1. Step 1: Write the proportion equation
   67.10 : 100.55 = 30.49 : x
2. Step 2: Convert to fraction form
   67.10/100.55 = 30.49/x
3. Step 3: Cross multiply
   67.10x = 100.55 × 30.49
4. Step 4: Simplify right side
   67.10x = 3,065.59
5. Step 5: Solve for x
   x = 3,065.59/67.10
6. Step 6: Final answer
   x = 45.69