Finding the Third Proportional to 2,129,520 and 3,216,456

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129,520 : 3,216,456 = 3,216,456 : x
2. Step 2: Convert to fraction form
   2,129,520/3,216,456 = 3,216,456/x
3. Step 3: Cross multiply
   2,129,520x = 3,216,456 × 3,216,456
4. Step 4: Simplify right side
   2,129,520x = 10,345,589,199,936
5. Step 5: Solve for x
   x = 10,345,589,199,936/2,129,520
6. Step 6: Final answer
   x = 4,858,178.93