Finding the Third Proportional to 2,399.63 and 5,505.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.63 : 5,505.47 = 5,505.47 : x
2. Step 2: Convert to fraction form
   2,399.63/5,505.47 = 5,505.47/x
3. Step 3: Cross multiply
   2,399.63x = 5,505.47 × 5,505.47
4. Step 4: Simplify right side
   2,399.63x = 30,310,186.16
5. Step 5: Solve for x
   x = 30,310,186.16/2,399.63
6. Step 6: Final answer
   x = 12,631.22