Finding the Third Proportional to 603,578.50 and 905,441

Step by Step Solution

1. Step 1: Write the proportion equation
   603,578.50 : 905,441 = 905,441 : x
2. Step 2: Convert to fraction form
   603,578.50/905,441 = 905,441/x
3. Step 3: Cross multiply
   603,578.50x = 905,441 × 905,441
4. Step 4: Simplify right side
   603,578.50x = 819,823,404,481
5. Step 5: Solve for x
   x = 819,823,404,481/603,578.50
6. Step 6: Final answer
   x = 1,358,271.38