Finding the Third Proportional to 300,028 and 421,974

Step by Step Solution

1. Step 1: Write the proportion equation
   300,028 : 421,974 = 421,974 : x
2. Step 2: Convert to fraction form
   300,028/421,974 = 421,974/x
3. Step 3: Cross multiply
   300,028x = 421,974 × 421,974
4. Step 4: Simplify right side
   300,028x = 178,062,056,676
5. Step 5: Solve for x
   x = 178,062,056,676/300,028
6. Step 6: Final answer
   x = 593,484.80