Finding the Third Proportional to 554,886 and 1,209,417

Step by Step Solution

1. Step 1: Write the proportion equation
   554,886 : 1,209,417 = 1,209,417 : x
2. Step 2: Convert to fraction form
   554,886/1,209,417 = 1,209,417/x
3. Step 3: Cross multiply
   554,886x = 1,209,417 × 1,209,417
4. Step 4: Simplify right side
   554,886x = 1,462,689,479,889
5. Step 5: Solve for x
   x = 1,462,689,479,889/554,886
6. Step 6: Final answer
   x = 2,636,017.99