Finding the Third Proportional to 2,686.50 and 5,845.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686.50 : 5,845.50 = 5,845.50 : x
2. Step 2: Convert to fraction form
   2,686.50/5,845.50 = 5,845.50/x
3. Step 3: Cross multiply
   2,686.50x = 5,845.50 × 5,845.50
4. Step 4: Simplify right side
   2,686.50x = 34,169,870.25
5. Step 5: Solve for x
   x = 34,169,870.25/2,686.50
6. Step 6: Final answer
   x = 12,719.10