Finding the Third Proportional to 523,780 and 800,890

Step by Step Solution

1. Step 1: Write the proportion equation
   523,780 : 800,890 = 800,890 : x
2. Step 2: Convert to fraction form
   523,780/800,890 = 800,890/x
3. Step 3: Cross multiply
   523,780x = 800,890 × 800,890
4. Step 4: Simplify right side
   523,780x = 641,424,792,100
5. Step 5: Solve for x
   x = 641,424,792,100/523,780
6. Step 6: Final answer
   x = 1,224,607.26