Finding the Third Proportional to 13,621.50 and 14,640.75

Step by Step Solution

1. Step 1: Write the proportion equation
   13,621.50 : 14,640.75 = 14,640.75 : x
2. Step 2: Convert to fraction form
   13,621.50/14,640.75 = 14,640.75/x
3. Step 3: Cross multiply
   13,621.50x = 14,640.75 × 14,640.75
4. Step 4: Simplify right side
   13,621.50x = 214,351,560.56
5. Step 5: Solve for x
   x = 214,351,560.56/13,621.50
6. Step 6: Final answer
   x = 15,736.27