Finding the Third Proportional to 30.79 and 42.76

Step by Step Solution

1. Step 1: Write the proportion equation
   30.79 : 42.76 = 42.76 : x
2. Step 2: Convert to fraction form
   30.79/42.76 = 42.76/x
3. Step 3: Cross multiply
   30.79x = 42.76 × 42.76
4. Step 4: Simplify right side
   30.79x = 1,828.68
5. Step 5: Solve for x
   x = 1,828.68/30.79
6. Step 6: Final answer
   x = 59.39