Finding the Third Proportional to 2,689.50 and 5,860.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,689.50 : 5,860.50 = 5,860.50 : x
2. Step 2: Convert to fraction form
   2,689.50/5,860.50 = 5,860.50/x
3. Step 3: Cross multiply
   2,689.50x = 5,860.50 × 5,860.50
4. Step 4: Simplify right side
   2,689.50x = 34,345,460.25
5. Step 5: Solve for x
   x = 34,345,460.25/2,689.50
6. Step 6: Final answer
   x = 12,770.20