Finding the Third Proportional to 1,686,890 and 3,673,278

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686,890 : 3,673,278 = 3,673,278 : x
2. Step 2: Convert to fraction form
   1,686,890/3,673,278 = 3,673,278/x
3. Step 3: Cross multiply
   1,686,890x = 3,673,278 × 3,673,278
4. Step 4: Simplify right side
   1,686,890x = 13,492,971,265,284
5. Step 5: Solve for x
   x = 13,492,971,265,284/1,686,890
6. Step 6: Final answer
   x = 7,998,726.22