Finding the Third Proportional to 1,018,521 and 2,120,718

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,521 : 2,120,718 = 2,120,718 : x
2. Step 2: Convert to fraction form
   1,018,521/2,120,718 = 2,120,718/x
3. Step 3: Cross multiply
   1,018,521x = 2,120,718 × 2,120,718
4. Step 4: Simplify right side
   1,018,521x = 4,497,444,835,524
5. Step 5: Solve for x
   x = 4,497,444,835,524/1,018,521
6. Step 6: Final answer
   x = 4,415,662.35