Finding the Third Proportional to 19,640 and 30,459

Step by Step Solution

1. Step 1: Write the proportion equation
   19,640 : 30,459 = 30,459 : x
2. Step 2: Convert to fraction form
   19,640/30,459 = 30,459/x
3. Step 3: Cross multiply
   19,640x = 30,459 × 30,459
4. Step 4: Simplify right side
   19,640x = 927,750,681
5. Step 5: Solve for x
   x = 927,750,681/19,640
6. Step 6: Final answer
   x = 47,237.81