Finding the Third Proportional to 878,646 and 1,918,404

Step by Step Solution

1. Step 1: Write the proportion equation
   878,646 : 1,918,404 = 1,918,404 : x
2. Step 2: Convert to fraction form
   878,646/1,918,404 = 1,918,404/x
3. Step 3: Cross multiply
   878,646x = 1,918,404 × 1,918,404
4. Step 4: Simplify right side
   878,646x = 3,680,273,907,216
5. Step 5: Solve for x
   x = 3,680,273,907,216/878,646
6. Step 6: Final answer
   x = 4,188,574.13