Finding the Third Proportional to 2,640,668 and 5,630,128

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640,668 : 5,630,128 = 5,630,128 : x
2. Step 2: Convert to fraction form
   2,640,668/5,630,128 = 5,630,128/x
3. Step 3: Cross multiply
   2,640,668x = 5,630,128 × 5,630,128
4. Step 4: Simplify right side
   2,640,668x = 31,698,341,296,384
5. Step 5: Solve for x
   x = 31,698,341,296,384/2,640,668
6. Step 6: Final answer
   x = 12,003,910.11