Finding the Third Proportional to 4,020,858 and 8,671,570

Step by Step Solution

1. Step 1: Write the proportion equation
   4,020,858 : 8,671,570 = 8,671,570 : x
2. Step 2: Convert to fraction form
   4,020,858/8,671,570 = 8,671,570/x
3. Step 3: Cross multiply
   4,020,858x = 8,671,570 × 8,671,570
4. Step 4: Simplify right side
   4,020,858x = 75,196,126,264,900
5. Step 5: Solve for x
   x = 75,196,126,264,900/4,020,858
6. Step 6: Final answer
   x = 18,701,512.53