Finding the Third Proportional to 5,605.50 and 8,679.75

Step by Step Solution

1. Step 1: Write the proportion equation
   5,605.50 : 8,679.75 = 8,679.75 : x
2. Step 2: Convert to fraction form
   5,605.50/8,679.75 = 8,679.75/x
3. Step 3: Cross multiply
   5,605.50x = 8,679.75 × 8,679.75
4. Step 4: Simplify right side
   5,605.50x = 75,338,060.06
5. Step 5: Solve for x
   x = 75,338,060.06/5,605.50
6. Step 6: Final answer
   x = 13,440.02