Finding the Third Proportional to 2,480.90 and 5,321.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,480.90 : 5,321.56 = 5,321.56 : x
2. Step 2: Convert to fraction form
   2,480.90/5,321.56 = 5,321.56/x
3. Step 3: Cross multiply
   2,480.90x = 5,321.56 × 5,321.56
4. Step 4: Simplify right side
   2,480.90x = 28,318,975.47
5. Step 5: Solve for x
   x = 28,318,975.47/2,480.90
6. Step 6: Final answer
   x = 11,414.79