Finding the Third Proportional to 442,730 and 978,488

Step by Step Solution

1. Step 1: Write the proportion equation
   442,730 : 978,488 = 978,488 : x
2. Step 2: Convert to fraction form
   442,730/978,488 = 978,488/x
3. Step 3: Cross multiply
   442,730x = 978,488 × 978,488
4. Step 4: Simplify right side
   442,730x = 957,438,766,144
5. Step 5: Solve for x
   x = 957,438,766,144/442,730
6. Step 6: Final answer
   x = 2,162,579.37