Finding the Third Proportional to 2,220,674 and 4,778,128

Step by Step Solution

1. Step 1: Write the proportion equation
   2,220,674 : 4,778,128 = 4,778,128 : x
2. Step 2: Convert to fraction form
   2,220,674/4,778,128 = 4,778,128/x
3. Step 3: Cross multiply
   2,220,674x = 4,778,128 × 4,778,128
4. Step 4: Simplify right side
   2,220,674x = 22,830,507,184,384
5. Step 5: Solve for x
   x = 22,830,507,184,384/2,220,674
6. Step 6: Final answer
   x = 10,280,890.93