Finding the Third Proportional to 2,178,478 and 4,787,012

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178,478 : 4,787,012 = 4,787,012 : x
2. Step 2: Convert to fraction form
   2,178,478/4,787,012 = 4,787,012/x
3. Step 3: Cross multiply
   2,178,478x = 4,787,012 × 4,787,012
4. Step 4: Simplify right side
   2,178,478x = 22,915,483,888,144
5. Step 5: Solve for x
   x = 22,915,483,888,144/2,178,478
6. Step 6: Final answer
   x = 10,519,033.88