Finding the Third Proportional to 20,405 and 43,260

Step by Step Solution

1. Step 1: Write the proportion equation
   20,405 : 43,260 = 43,260 : x
2. Step 2: Convert to fraction form
   20,405/43,260 = 43,260/x
3. Step 3: Cross multiply
   20,405x = 43,260 × 43,260
4. Step 4: Simplify right side
   20,405x = 1,871,427,600
5. Step 5: Solve for x
   x = 1,871,427,600/20,405
6. Step 6: Final answer
   x = 91,714.17