Finding the Third Proportional to 42.25 and 58

Step by Step Solution

1. Step 1: Write the proportion equation
   42.25 : 58 = 58 : x
2. Step 2: Convert to fraction form
   42.25/58 = 58/x
3. Step 3: Cross multiply
   42.25x = 58 × 58
4. Step 4: Simplify right side
   42.25x = 3,364
5. Step 5: Solve for x
   x = 3,364/42.25
6. Step 6: Final answer
   x = 79.62