Finding the Third Proportional to 300,612 and 450,090

Step by Step Solution

1. Step 1: Write the proportion equation
   300,612 : 450,090 = 450,090 : x
2. Step 2: Convert to fraction form
   300,612/450,090 = 450,090/x
3. Step 3: Cross multiply
   300,612x = 450,090 × 450,090
4. Step 4: Simplify right side
   300,612x = 202,581,008,100
5. Step 5: Solve for x
   x = 202,581,008,100/300,612
6. Step 6: Final answer
   x = 673,895.28