Finding the Third Proportional to 5,530.50 and 7,778.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,530.50 : 7,778.25 = 7,778.25 : x
2. Step 2: Convert to fraction form
   5,530.50/7,778.25 = 7,778.25/x
3. Step 3: Cross multiply
   5,530.50x = 7,778.25 × 7,778.25
4. Step 4: Simplify right side
   5,530.50x = 60,501,173.06
5. Step 5: Solve for x
   x = 60,501,173.06/5,530.50
6. Step 6: Final answer
   x = 10,939.55