Finding the Third Proportional to 4,280,458 and 8,915,210

Step by Step Solution

1. Step 1: Write the proportion equation
   4,280,458 : 8,915,210 = 8,915,210 : x
2. Step 2: Convert to fraction form
   4,280,458/8,915,210 = 8,915,210/x
3. Step 3: Cross multiply
   4,280,458x = 8,915,210 × 8,915,210
4. Step 4: Simplify right side
   4,280,458x = 79,480,969,344,100
5. Step 5: Solve for x
   x = 79,480,969,344,100/4,280,458
6. Step 6: Final answer
   x = 18,568,332.96