Finding the Third Proportional to 12,852 and 21,242.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,852 : 21,242.25 = 21,242.25 : x
2. Step 2: Convert to fraction form
   12,852/21,242.25 = 21,242.25/x
3. Step 3: Cross multiply
   12,852x = 21,242.25 × 21,242.25
4. Step 4: Simplify right side
   12,852x = 451,233,185.06
5. Step 5: Solve for x
   x = 451,233,185.06/12,852
6. Step 6: Final answer
   x = 35,109.96