Finding the Third Proportional to 2,552.21 and 5,621.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,552.21 : 5,621.27 = 5,621.27 : x
2. Step 2: Convert to fraction form
   2,552.21/5,621.27 = 5,621.27/x
3. Step 3: Cross multiply
   2,552.21x = 5,621.27 × 5,621.27
4. Step 4: Simplify right side
   2,552.21x = 31,598,715.06
5. Step 5: Solve for x
   x = 31,598,715.06/2,552.21
6. Step 6: Final answer
   x = 12,380.91