Finding the Fourth Proportional to 67.34, 100.78 and 50.19

Step by Step Solution

1. Step 1: Write the proportion equation
   67.34 : 100.78 = 50.19 : x
2. Step 2: Convert to fraction form
   67.34/100.78 = 50.19/x
3. Step 3: Cross multiply
   67.34x = 100.78 × 50.19
4. Step 4: Simplify right side
   67.34x = 5,058.15
5. Step 5: Solve for x
   x = 5,058.15/67.34
6. Step 6: Final answer
   x = 75.11