Finding the Fourth Proportional to 79.10, 118.56 and 42.49

Step by Step Solution

1. Step 1: Write the proportion equation
   79.10 : 118.56 = 42.49 : x
2. Step 2: Convert to fraction form
   79.10/118.56 = 42.49/x
3. Step 3: Cross multiply
   79.10x = 118.56 × 42.49
4. Step 4: Simplify right side
   79.10x = 5,037.90
5. Step 5: Solve for x
   x = 5,037.90/79.10
6. Step 6: Final answer
   x = 63.69