Finding the Third Proportional to 11,456 and 21,440

Step by Step Solution

1. Step 1: Write the proportion equation
   11,456 : 21,440 = 21,440 : x
2. Step 2: Convert to fraction form
   11,456/21,440 = 21,440/x
3. Step 3: Cross multiply
   11,456x = 21,440 × 21,440
4. Step 4: Simplify right side
   11,456x = 459,673,600
5. Step 5: Solve for x
   x = 459,673,600/11,456
6. Step 6: Final answer
   x = 40,125.14