Finding the Third Proportional to 19.76 and 42.26

Step by Step Solution

1. Step 1: Write the proportion equation
   19.76 : 42.26 = 42.26 : x
2. Step 2: Convert to fraction form
   19.76/42.26 = 42.26/x
3. Step 3: Cross multiply
   19.76x = 42.26 × 42.26
4. Step 4: Simplify right side
   19.76x = 1,785.72
5. Step 5: Solve for x
   x = 1,785.72/19.76
6. Step 6: Final answer
   x = 90.38