Finding the Third Proportional to 19.31 and 35.81

Step by Step Solution

1. Step 1: Write the proportion equation
   19.31 : 35.81 = 35.81 : x
2. Step 2: Convert to fraction form
   19.31/35.81 = 35.81/x
3. Step 3: Cross multiply
   19.31x = 35.81 × 35.81
4. Step 4: Simplify right side
   19.31x = 1,282.54
5. Step 5: Solve for x
   x = 1,282.54/19.31
6. Step 6: Final answer
   x = 66.41