Finding the Third Proportional to 2,609 and 5,559.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609 : 5,559.50 = 5,559.50 : x
2. Step 2: Convert to fraction form
   2,609/5,559.50 = 5,559.50/x
3. Step 3: Cross multiply
   2,609x = 5,559.50 × 5,559.50
4. Step 4: Simplify right side
   2,609x = 30,908,040.25
5. Step 5: Solve for x
   x = 30,908,040.25/2,609
6. Step 6: Final answer
   x = 11,846.70