Finding the Third Proportional to 13,159.13 and 16,660.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,159.13 : 16,660.69 = 16,660.69 : x
2. Step 2: Convert to fraction form
   13,159.13/16,660.69 = 16,660.69/x
3. Step 3: Cross multiply
   13,159.13x = 16,660.69 × 16,660.69
4. Step 4: Simplify right side
   13,159.13x = 277,578,507.97
5. Step 5: Solve for x
   x = 277,578,507.97/13,159.13
6. Step 6: Final answer
   x = 21,093.99