Finding the Third Proportional to 3,256.69 and 7,680.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,256.69 : 7,680.09 = 7,680.09 : x
2. Step 2: Convert to fraction form
   3,256.69/7,680.09 = 7,680.09/x
3. Step 3: Cross multiply
   3,256.69x = 7,680.09 × 7,680.09
4. Step 4: Simplify right side
   3,256.69x = 58,983,840.01
5. Step 5: Solve for x
   x = 58,983,840.01/3,256.69
6. Step 6: Final answer
   x = 18,111.61