Finding the Third Proportional to 8,667.75 and 12,839.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.75 : 12,839.63 = 12,839.63 : x
2. Step 2: Convert to fraction form
   8,667.75/12,839.63 = 12,839.63/x
3. Step 3: Cross multiply
   8,667.75x = 12,839.63 × 12,839.63
4. Step 4: Simplify right side
   8,667.75x = 164,855,970.14
5. Step 5: Solve for x
   x = 164,855,970.14/8,667.75
6. Step 6: Final answer
   x = 19,019.47