Finding the Third Proportional to 407,401 and 877,212

Step by Step Solution

1. Step 1: Write the proportion equation
   407,401 : 877,212 = 877,212 : x
2. Step 2: Convert to fraction form
   407,401/877,212 = 877,212/x
3. Step 3: Cross multiply
   407,401x = 877,212 × 877,212
4. Step 4: Simplify right side
   407,401x = 769,500,892,944
5. Step 5: Solve for x
   x = 769,500,892,944/407,401
6. Step 6: Final answer
   x = 1,888,804.62