Finding the Third Proportional to 9,139 and 18,997

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139 : 18,997 = 18,997 : x
2. Step 2: Convert to fraction form
   9,139/18,997 = 18,997/x
3. Step 3: Cross multiply
   9,139x = 18,997 × 18,997
4. Step 4: Simplify right side
   9,139x = 360,886,009
5. Step 5: Solve for x
   x = 360,886,009/9,139
6. Step 6: Final answer
   x = 39,488.57