Finding the Third Proportional to 10,256.63 and 20,356.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,256.63 : 20,356.31 = 20,356.31 : x
2. Step 2: Convert to fraction form
   10,256.63/20,356.31 = 20,356.31/x
3. Step 3: Cross multiply
   10,256.63x = 20,356.31 × 20,356.31
4. Step 4: Simplify right side
   10,256.63x = 414,379,458.60
5. Step 5: Solve for x
   x = 414,379,458.60/10,256.63
6. Step 6: Final answer
   x = 40,401.15