Finding the Third Proportional to 13,173.75 and 16,692.75

Step by Step Solution

1. Step 1: Write the proportion equation
   13,173.75 : 16,692.75 = 16,692.75 : x
2. Step 2: Convert to fraction form
   13,173.75/16,692.75 = 16,692.75/x
3. Step 3: Cross multiply
   13,173.75x = 16,692.75 × 16,692.75
4. Step 4: Simplify right side
   13,173.75x = 278,647,902.56
5. Step 5: Solve for x
   x = 278,647,902.56/13,173.75
6. Step 6: Final answer
   x = 21,151.75