Finding the Third Proportional to 20,790 and 43,308

Step by Step Solution

1. Step 1: Write the proportion equation
   20,790 : 43,308 = 43,308 : x
2. Step 2: Convert to fraction form
   20,790/43,308 = 43,308/x
3. Step 3: Cross multiply
   20,790x = 43,308 × 43,308
4. Step 4: Simplify right side
   20,790x = 1,875,582,864
5. Step 5: Solve for x
   x = 1,875,582,864/20,790
6. Step 6: Final answer
   x = 90,215.63