Finding the Fourth Proportional to 79.41, 109.59 and 50.31

Step by Step Solution

1. Step 1: Write the proportion equation
   79.41 : 109.59 = 50.31 : x
2. Step 2: Convert to fraction form
   79.41/109.59 = 50.31/x
3. Step 3: Cross multiply
   79.41x = 109.59 × 50.31
4. Step 4: Simplify right side
   79.41x = 5,513.47
5. Step 5: Solve for x
   x = 5,513.47/79.41
6. Step 6: Final answer
   x = 69.43