Finding the Third Proportional to 407,838 and 889,404

Step by Step Solution

1. Step 1: Write the proportion equation
   407,838 : 889,404 = 889,404 : x
2. Step 2: Convert to fraction form
   407,838/889,404 = 889,404/x
3. Step 3: Cross multiply
   407,838x = 889,404 × 889,404
4. Step 4: Simplify right side
   407,838x = 791,039,475,216
5. Step 5: Solve for x
   x = 791,039,475,216/407,838
6. Step 6: Final answer
   x = 1,939,592.38