Finding the Third Proportional to 442,698 and 978,432

Step by Step Solution

1. Step 1: Write the proportion equation
   442,698 : 978,432 = 978,432 : x
2. Step 2: Convert to fraction form
   442,698/978,432 = 978,432/x
3. Step 3: Cross multiply
   442,698x = 978,432 × 978,432
4. Step 4: Simplify right side
   442,698x = 957,329,178,624
5. Step 5: Solve for x
   x = 957,329,178,624/442,698
6. Step 6: Final answer
   x = 2,162,488.15