Finding the Third Proportional to 3,938,766 and 8,480,172

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938,766 : 8,480,172 = 8,480,172 : x
2. Step 2: Convert to fraction form
   3,938,766/8,480,172 = 8,480,172/x
3. Step 3: Cross multiply
   3,938,766x = 8,480,172 × 8,480,172
4. Step 4: Simplify right side
   3,938,766x = 71,913,317,149,584
5. Step 5: Solve for x
   x = 71,913,317,149,584/3,938,766
6. Step 6: Final answer
   x = 18,257,829.27