Finding the Third Proportional to 4,280,472 and 8,915,240

Step by Step Solution

1. Step 1: Write the proportion equation
   4,280,472 : 8,915,240 = 8,915,240 : x
2. Step 2: Convert to fraction form
   4,280,472/8,915,240 = 8,915,240/x
3. Step 3: Cross multiply
   4,280,472x = 8,915,240 × 8,915,240
4. Step 4: Simplify right side
   4,280,472x = 79,481,504,257,600
5. Step 5: Solve for x
   x = 79,481,504,257,600/4,280,472
6. Step 6: Final answer
   x = 18,568,397.19