Finding the Fourth Proportional to 67.25, 100.87 and 19.15

Step by Step Solution

1. Step 1: Write the proportion equation
   67.25 : 100.87 = 19.15 : x
2. Step 2: Convert to fraction form
   67.25/100.87 = 19.15/x
3. Step 3: Cross multiply
   67.25x = 100.87 × 19.15
4. Step 4: Simplify right side
   67.25x = 1,932.06
5. Step 5: Solve for x
   x = 1,932.06/67.25
6. Step 6: Final answer
   x = 28.73