Finding the Third Proportional to 838,390 and 1,818,561

Step by Step Solution

1. Step 1: Write the proportion equation
   838,390 : 1,818,561 = 1,818,561 : x
2. Step 2: Convert to fraction form
   838,390/1,818,561 = 1,818,561/x
3. Step 3: Cross multiply
   838,390x = 1,818,561 × 1,818,561
4. Step 4: Simplify right side
   838,390x = 3,307,164,110,721
5. Step 5: Solve for x
   x = 3,307,164,110,721/838,390
6. Step 6: Final answer
   x = 3,944,660.73