Finding the Third Proportional to 315,401 and 424,960

Step by Step Solution

1. Step 1: Write the proportion equation
   315,401 : 424,960 = 424,960 : x
2. Step 2: Convert to fraction form
   315,401/424,960 = 424,960/x
3. Step 3: Cross multiply
   315,401x = 424,960 × 424,960
4. Step 4: Simplify right side
   315,401x = 180,591,001,600
5. Step 5: Solve for x
   x = 180,591,001,600/315,401
6. Step 6: Final answer
   x = 572,575.87