Finding the Third Proportional to 3,880,620 and 8,163,418

Step by Step Solution

1. Step 1: Write the proportion equation
   3,880,620 : 8,163,418 = 8,163,418 : x
2. Step 2: Convert to fraction form
   3,880,620/8,163,418 = 8,163,418/x
3. Step 3: Cross multiply
   3,880,620x = 8,163,418 × 8,163,418
4. Step 4: Simplify right side
   3,880,620x = 66,641,393,442,724
5. Step 5: Solve for x
   x = 66,641,393,442,724/3,880,620
6. Step 6: Final answer
   x = 17,172,872.75