Finding the Third Proportional to 5,518.50 and 10,759.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,518.50 : 10,759.50 = 10,759.50 : x
2. Step 2: Convert to fraction form
   5,518.50/10,759.50 = 10,759.50/x
3. Step 3: Cross multiply
   5,518.50x = 10,759.50 × 10,759.50
4. Step 4: Simplify right side
   5,518.50x = 115,766,840.25
5. Step 5: Solve for x
   x = 115,766,840.25/5,518.50
6. Step 6: Final answer
   x = 20,977.95