Finding the Third Proportional to 10,457 and 21,427

Step by Step Solution

1. Step 1: Write the proportion equation
   10,457 : 21,427 = 21,427 : x
2. Step 2: Convert to fraction form
   10,457/21,427 = 21,427/x
3. Step 3: Cross multiply
   10,457x = 21,427 × 21,427
4. Step 4: Simplify right side
   10,457x = 459,116,329
5. Step 5: Solve for x
   x = 459,116,329/10,457
6. Step 6: Final answer
   x = 43,905.17