Finding the Third Proportional to 1,205,309 and 1,636,959

Step by Step Solution

1. Step 1: Write the proportion equation
   1,205,309 : 1,636,959 = 1,636,959 : x
2. Step 2: Convert to fraction form
   1,205,309/1,636,959 = 1,636,959/x
3. Step 3: Cross multiply
   1,205,309x = 1,636,959 × 1,636,959
4. Step 4: Simplify right side
   1,205,309x = 2,679,634,767,681
5. Step 5: Solve for x
   x = 2,679,634,767,681/1,205,309
6. Step 6: Final answer
   x = 2,223,193.20