Finding the Third Proportional to 195,690 and 428,886

Step by Step Solution

1. Step 1: Write the proportion equation
   195,690 : 428,886 = 428,886 : x
2. Step 2: Convert to fraction form
   195,690/428,886 = 428,886/x
3. Step 3: Cross multiply
   195,690x = 428,886 × 428,886
4. Step 4: Simplify right side
   195,690x = 183,943,200,996
5. Step 5: Solve for x
   x = 183,943,200,996/195,690
6. Step 6: Final answer
   x = 939,972.41