Finding the Third Proportional to 2,180,520 and 4,778,144

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180,520 : 4,778,144 = 4,778,144 : x
2. Step 2: Convert to fraction form
   2,180,520/4,778,144 = 4,778,144/x
3. Step 3: Cross multiply
   2,180,520x = 4,778,144 × 4,778,144
4. Step 4: Simplify right side
   2,180,520x = 22,830,660,084,736
5. Step 5: Solve for x
   x = 22,830,660,084,736/2,180,520
6. Step 6: Final answer
   x = 10,470,282.36