Finding the Third Proportional to 19,990 and 40,667

Step by Step Solution

1. Step 1: Write the proportion equation
   19,990 : 40,667 = 40,667 : x
2. Step 2: Convert to fraction form
   19,990/40,667 = 40,667/x
3. Step 3: Cross multiply
   19,990x = 40,667 × 40,667
4. Step 4: Simplify right side
   19,990x = 1,653,804,889
5. Step 5: Solve for x
   x = 1,653,804,889/19,990
6. Step 6: Final answer
   x = 82,731.61