Finding the Third Proportional to 398,947 and 874,196

Step by Step Solution

1. Step 1: Write the proportion equation
   398,947 : 874,196 = 874,196 : x
2. Step 2: Convert to fraction form
   398,947/874,196 = 874,196/x
3. Step 3: Cross multiply
   398,947x = 874,196 × 874,196
4. Step 4: Simplify right side
   398,947x = 764,218,646,416
5. Step 5: Solve for x
   x = 764,218,646,416/398,947
6. Step 6: Final answer
   x = 1,915,589.41