Finding the Third Proportional to 828,604 and 1,279,540

Step by Step Solution

1. Step 1: Write the proportion equation
   828,604 : 1,279,540 = 1,279,540 : x
2. Step 2: Convert to fraction form
   828,604/1,279,540 = 1,279,540/x
3. Step 3: Cross multiply
   828,604x = 1,279,540 × 1,279,540
4. Step 4: Simplify right side
   828,604x = 1,637,222,611,600
5. Step 5: Solve for x
   x = 1,637,222,611,600/828,604
6. Step 6: Final answer
   x = 1,975,880.65