Finding the Third Proportional to 4,021,608 and 8,618,880

Step by Step Solution

1. Step 1: Write the proportion equation
   4,021,608 : 8,618,880 = 8,618,880 : x
2. Step 2: Convert to fraction form
   4,021,608/8,618,880 = 8,618,880/x
3. Step 3: Cross multiply
   4,021,608x = 8,618,880 × 8,618,880
4. Step 4: Simplify right side
   4,021,608x = 74,285,092,454,400
5. Step 5: Solve for x
   x = 74,285,092,454,400/4,021,608
6. Step 6: Final answer
   x = 18,471,490.12