Finding the Third Proportional to 13,155.75 and 16,665.75

Step by Step Solution

1. Step 1: Write the proportion equation
   13,155.75 : 16,665.75 = 16,665.75 : x
2. Step 2: Convert to fraction form
   13,155.75/16,665.75 = 16,665.75/x
3. Step 3: Cross multiply
   13,155.75x = 16,665.75 × 16,665.75
4. Step 4: Simplify right side
   13,155.75x = 277,747,223.06
5. Step 5: Solve for x
   x = 277,747,223.06/13,155.75
6. Step 6: Final answer
   x = 21,112.23