Finding the Fourth Proportional to 79.30, 118.96 and 42.76

Step by Step Solution

1. Step 1: Write the proportion equation
   79.30 : 118.96 = 42.76 : x
2. Step 2: Convert to fraction form
   79.30/118.96 = 42.76/x
3. Step 3: Cross multiply
   79.30x = 118.96 × 42.76
4. Step 4: Simplify right side
   79.30x = 5,086.73
5. Step 5: Solve for x
   x = 5,086.73/79.30
6. Step 6: Final answer
   x = 64.15