Finding the Third Proportional to 554,892 and 840,384

Step by Step Solution

1. Step 1: Write the proportion equation
   554,892 : 840,384 = 840,384 : x
2. Step 2: Convert to fraction form
   554,892/840,384 = 840,384/x
3. Step 3: Cross multiply
   554,892x = 840,384 × 840,384
4. Step 4: Simplify right side
   554,892x = 706,245,267,456
5. Step 5: Solve for x
   x = 706,245,267,456/554,892
6. Step 6: Final answer
   x = 1,272,761.67