Finding the Fourth Proportional to 67.35, 100.83 and 50.31

Step by Step Solution

1. Step 1: Write the proportion equation
   67.35 : 100.83 = 50.31 : x
2. Step 2: Convert to fraction form
   67.35/100.83 = 50.31/x
3. Step 3: Cross multiply
   67.35x = 100.83 × 50.31
4. Step 4: Simplify right side
   67.35x = 5,072.76
5. Step 5: Solve for x
   x = 5,072.76/67.35
6. Step 6: Final answer
   x = 75.32