Finding the Third Proportional to 1,018,512 and 2,120,699

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,512 : 2,120,699 = 2,120,699 : x
2. Step 2: Convert to fraction form
   1,018,512/2,120,699 = 2,120,699/x
3. Step 3: Cross multiply
   1,018,512x = 2,120,699 × 2,120,699
4. Step 4: Simplify right side
   1,018,512x = 4,497,364,248,601
5. Step 5: Solve for x
   x = 4,497,364,248,601/1,018,512
6. Step 6: Final answer
   x = 4,415,622.25