Finding the Third Proportional to 3,657.50 and 5,519.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,657.50 : 5,519.50 = 5,519.50 : x
2. Step 2: Convert to fraction form
   3,657.50/5,519.50 = 5,519.50/x
3. Step 3: Cross multiply
   3,657.50x = 5,519.50 × 5,519.50
4. Step 4: Simplify right side
   3,657.50x = 30,464,880.25
5. Step 5: Solve for x
   x = 30,464,880.25/3,657.50
6. Step 6: Final answer
   x = 8,329.43