Finding the Third Proportional to 2,646.56 and 5,559.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.56 : 5,559.75 = 5,559.75 : x
2. Step 2: Convert to fraction form
   2,646.56/5,559.75 = 5,559.75/x
3. Step 3: Cross multiply
   2,646.56x = 5,559.75 × 5,559.75
4. Step 4: Simplify right side
   2,646.56x = 30,910,820.06
5. Step 5: Solve for x
   x = 30,910,820.06/2,646.56
6. Step 6: Final answer
   x = 11,679.61