Finding the Third Proportional to 1,243,691 and 2,636,843

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,691 : 2,636,843 = 2,636,843 : x
2. Step 2: Convert to fraction form
   1,243,691/2,636,843 = 2,636,843/x
3. Step 3: Cross multiply
   1,243,691x = 2,636,843 × 2,636,843
4. Step 4: Simplify right side
   1,243,691x = 6,952,941,006,649
5. Step 5: Solve for x
   x = 6,952,941,006,649/1,243,691
6. Step 6: Final answer
   x = 5,590,569.53