Finding the Third Proportional to 402,810 and 877,510

Step by Step Solution

1. Step 1: Write the proportion equation
   402,810 : 877,510 = 877,510 : x
2. Step 2: Convert to fraction form
   402,810/877,510 = 877,510/x
3. Step 3: Cross multiply
   402,810x = 877,510 × 877,510
4. Step 4: Simplify right side
   402,810x = 770,023,800,100
5. Step 5: Solve for x
   x = 770,023,800,100/402,810
6. Step 6: Final answer
   x = 1,911,630.30