Finding the Third Proportional to 5,457 and 10,131

Step by Step Solution

1. Step 1: Write the proportion equation
   5,457 : 10,131 = 10,131 : x
2. Step 2: Convert to fraction form
   5,457/10,131 = 10,131/x
3. Step 3: Cross multiply
   5,457x = 10,131 × 10,131
4. Step 4: Simplify right side
   5,457x = 102,637,161
5. Step 5: Solve for x
   x = 102,637,161/5,457
6. Step 6: Final answer
   x = 18,808.35