Finding the Fourth Proportional to 67.34, 100.94 and 28.80

Step by Step Solution

1. Step 1: Write the proportion equation
   67.34 : 100.94 = 28.80 : x
2. Step 2: Convert to fraction form
   67.34/100.94 = 28.80/x
3. Step 3: Cross multiply
   67.34x = 100.94 × 28.80
4. Step 4: Simplify right side
   67.34x = 2,906.93
5. Step 5: Solve for x
   x = 2,906.93/67.34
6. Step 6: Final answer
   x = 43.17