Finding the Third Proportional to 406,503 and 603,861.75

Step by Step Solution

1. Step 1: Write the proportion equation
   406,503 : 603,861.75 = 603,861.75 : x
2. Step 2: Convert to fraction form
   406,503/603,861.75 = 603,861.75/x
3. Step 3: Cross multiply
   406,503x = 603,861.75 × 603,861.75
4. Step 4: Simplify right side
   406,503x = 364,649,013,113.06
5. Step 5: Solve for x
   x = 364,649,013,113.06/406,503
6. Step 6: Final answer
   x = 897,038.92