Finding the Third Proportional to 305,674.50 and 670,398

Step by Step Solution

1. Step 1: Write the proportion equation
   305,674.50 : 670,398 = 670,398 : x
2. Step 2: Convert to fraction form
   305,674.50/670,398 = 670,398/x
3. Step 3: Cross multiply
   305,674.50x = 670,398 × 670,398
4. Step 4: Simplify right side
   305,674.50x = 449,433,478,404
5. Step 5: Solve for x
   x = 449,433,478,404/305,674.50
6. Step 6: Final answer
   x = 1,470,300.85