Finding the Third Proportional to 2,157,838 and 3,221,980

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157,838 : 3,221,980 = 3,221,980 : x
2. Step 2: Convert to fraction form
   2,157,838/3,221,980 = 3,221,980/x
3. Step 3: Cross multiply
   2,157,838x = 3,221,980 × 3,221,980
4. Step 4: Simplify right side
   2,157,838x = 10,381,155,120,400
5. Step 5: Solve for x
   x = 10,381,155,120,400/2,157,838
6. Step 6: Final answer
   x = 4,810,905.69