Finding the Third Proportional to 1,018,599 and 2,158,623

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,599 : 2,158,623 = 2,158,623 : x
2. Step 2: Convert to fraction form
   1,018,599/2,158,623 = 2,158,623/x
3. Step 3: Cross multiply
   1,018,599x = 2,158,623 × 2,158,623
4. Step 4: Simplify right side
   1,018,599x = 4,659,653,256,129
5. Step 5: Solve for x
   x = 4,659,653,256,129/1,018,599
6. Step 6: Final answer
   x = 4,574,570.81