Finding the Third Proportional to 300,518 and 634,570

Step by Step Solution

1. Step 1: Write the proportion equation
   300,518 : 634,570 = 634,570 : x
2. Step 2: Convert to fraction form
   300,518/634,570 = 634,570/x
3. Step 3: Cross multiply
   300,518x = 634,570 × 634,570
4. Step 4: Simplify right side
   300,518x = 402,679,084,900
5. Step 5: Solve for x
   x = 402,679,084,900/300,518
6. Step 6: Final answer
   x = 1,339,949.97