Finding the Third Proportional to 406,401.75 and 603,720

Step by Step Solution

1. Step 1: Write the proportion equation
   406,401.75 : 603,720 = 603,720 : x
2. Step 2: Convert to fraction form
   406,401.75/603,720 = 603,720/x
3. Step 3: Cross multiply
   406,401.75x = 603,720 × 603,720
4. Step 4: Simplify right side
   406,401.75x = 364,477,838,400
5. Step 5: Solve for x
   x = 364,477,838,400/406,401.75
6. Step 6: Final answer
   x = 896,841.21