Finding the Third Proportional to 1,215,680 and 2,619,897

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,680 : 2,619,897 = 2,619,897 : x
2. Step 2: Convert to fraction form
   1,215,680/2,619,897 = 2,619,897/x
3. Step 3: Cross multiply
   1,215,680x = 2,619,897 × 2,619,897
4. Step 4: Simplify right side
   1,215,680x = 6,863,860,290,609
5. Step 5: Solve for x
   x = 6,863,860,290,609/1,215,680
6. Step 6: Final answer
   x = 5,646,107.77