Finding the Third Proportional to 5,276.81 and 8,355.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,276.81 : 8,355.56 = 8,355.56 : x
2. Step 2: Convert to fraction form
   5,276.81/8,355.56 = 8,355.56/x
3. Step 3: Cross multiply
   5,276.81x = 8,355.56 × 8,355.56
4. Step 4: Simplify right side
   5,276.81x = 69,815,424.69
5. Step 5: Solve for x
   x = 69,815,424.69/5,276.81
6. Step 6: Final answer
   x = 13,230.61