Finding the Third Proportional to 310,730 and 673,300

Step by Step Solution

1. Step 1: Write the proportion equation
   310,730 : 673,300 = 673,300 : x
2. Step 2: Convert to fraction form
   310,730/673,300 = 673,300/x
3. Step 3: Cross multiply
   310,730x = 673,300 × 673,300
4. Step 4: Simplify right side
   310,730x = 453,332,890,000
5. Step 5: Solve for x
   x = 453,332,890,000/310,730
6. Step 6: Final answer
   x = 1,458,928.62