Finding the Third Proportional to 16,999.88 and 18,270.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,999.88 : 18,270.56 = 18,270.56 : x
2. Step 2: Convert to fraction form
   16,999.88/18,270.56 = 18,270.56/x
3. Step 3: Cross multiply
   16,999.88x = 18,270.56 × 18,270.56
4. Step 4: Simplify right side
   16,999.88x = 333,813,454.07
5. Step 5: Solve for x
   x = 333,813,454.07/16,999.88
6. Step 6: Final answer
   x = 19,636.23