Finding the Third Proportional to 300,487.50 and 612,105.75

Step by Step Solution

1. Step 1: Write the proportion equation
   300,487.50 : 612,105.75 = 612,105.75 : x
2. Step 2: Convert to fraction form
   300,487.50/612,105.75 = 612,105.75/x
3. Step 3: Cross multiply
   300,487.50x = 612,105.75 × 612,105.75
4. Step 4: Simplify right side
   300,487.50x = 374,673,449,183.06
5. Step 5: Solve for x
   x = 374,673,449,183.06/300,487.50
6. Step 6: Final answer
   x = 1,246,885.31