Finding the Third Proportional to 2,157,228 and 4,690,980

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157,228 : 4,690,980 = 4,690,980 : x
2. Step 2: Convert to fraction form
   2,157,228/4,690,980 = 4,690,980/x
3. Step 3: Cross multiply
   2,157,228x = 4,690,980 × 4,690,980
4. Step 4: Simplify right side
   2,157,228x = 22,005,293,360,400
5. Step 5: Solve for x
   x = 22,005,293,360,400/2,157,228
6. Step 6: Final answer
   x = 10,200,726.75