Finding the Third Proportional to 904,409 and 1,399,760

Step by Step Solution

1. Step 1: Write the proportion equation
   904,409 : 1,399,760 = 1,399,760 : x
2. Step 2: Convert to fraction form
   904,409/1,399,760 = 1,399,760/x
3. Step 3: Cross multiply
   904,409x = 1,399,760 × 1,399,760
4. Step 4: Simplify right side
   904,409x = 1,959,328,057,600
5. Step 5: Solve for x
   x = 1,959,328,057,600/904,409
6. Step 6: Final answer
   x = 2,166,418.13