Finding the Third Proportional to 20,790 and 45,470

Step by Step Solution

1. Step 1: Write the proportion equation
   20,790 : 45,470 = 45,470 : x
2. Step 2: Convert to fraction form
   20,790/45,470 = 45,470/x
3. Step 3: Cross multiply
   20,790x = 45,470 × 45,470
4. Step 4: Simplify right side
   20,790x = 2,067,520,900
5. Step 5: Solve for x
   x = 2,067,520,900/20,790
6. Step 6: Final answer
   x = 99,447.85