Finding the Fourth Proportional to 79.18, 109.31 and 50.10

Step by Step Solution

1. Step 1: Write the proportion equation
   79.18 : 109.31 = 50.10 : x
2. Step 2: Convert to fraction form
   79.18/109.31 = 50.10/x
3. Step 3: Cross multiply
   79.18x = 109.31 × 50.10
4. Step 4: Simplify right side
   79.18x = 5,476.43
5. Step 5: Solve for x
   x = 5,476.43/79.18
6. Step 6: Final answer
   x = 69.16