Finding the Fourth Proportional to 78.41, 108.17 and 50.79

Step by Step Solution

1. Step 1: Write the proportion equation
   78.41 : 108.17 = 50.79 : x
2. Step 2: Convert to fraction form
   78.41/108.17 = 50.79/x
3. Step 3: Cross multiply
   78.41x = 108.17 × 50.79
4. Step 4: Simplify right side
   78.41x = 5,493.72
5. Step 5: Solve for x
   x = 5,493.72/78.41
6. Step 6: Final answer
   x = 70.06