Finding the Third Proportional to 3,915,554 and 8,484,384

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915,554 : 8,484,384 = 8,484,384 : x
2. Step 2: Convert to fraction form
   3,915,554/8,484,384 = 8,484,384/x
3. Step 3: Cross multiply
   3,915,554x = 8,484,384 × 8,484,384
4. Step 4: Simplify right side
   3,915,554x = 71,984,771,859,456
5. Step 5: Solve for x
   x = 71,984,771,859,456/3,915,554
6. Step 6: Final answer
   x = 18,384,313.40