Finding the Third Proportional to 819,723 and 1,680,270

Step by Step Solution

1. Step 1: Write the proportion equation
   819,723 : 1,680,270 = 1,680,270 : x
2. Step 2: Convert to fraction form
   819,723/1,680,270 = 1,680,270/x
3. Step 3: Cross multiply
   819,723x = 1,680,270 × 1,680,270
4. Step 4: Simplify right side
   819,723x = 2,823,307,272,900
5. Step 5: Solve for x
   x = 2,823,307,272,900/819,723
6. Step 6: Final answer
   x = 3,444,221.12