Finding the Third Proportional to 3,669,455 and 8,290,220

Step by Step Solution

1. Step 1: Write the proportion equation
   3,669,455 : 8,290,220 = 8,290,220 : x
2. Step 2: Convert to fraction form
   3,669,455/8,290,220 = 8,290,220/x
3. Step 3: Cross multiply
   3,669,455x = 8,290,220 × 8,290,220
4. Step 4: Simplify right side
   3,669,455x = 68,727,747,648,400
5. Step 5: Solve for x
   x = 68,727,747,648,400/3,669,455
6. Step 6: Final answer
   x = 18,729,688.10