Finding the Fourth Proportional to 71.76, 107.36 and 50.34

Step by Step Solution

1. Step 1: Write the proportion equation
   71.76 : 107.36 = 50.34 : x
2. Step 2: Convert to fraction form
   71.76/107.36 = 50.34/x
3. Step 3: Cross multiply
   71.76x = 107.36 × 50.34
4. Step 4: Simplify right side
   71.76x = 5,404.50
5. Step 5: Solve for x
   x = 5,404.50/71.76
6. Step 6: Final answer
   x = 75.31