Finding the Third Proportional to 1,012,918 and 2,161,428

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012,918 : 2,161,428 = 2,161,428 : x
2. Step 2: Convert to fraction form
   1,012,918/2,161,428 = 2,161,428/x
3. Step 3: Cross multiply
   1,012,918x = 2,161,428 × 2,161,428
4. Step 4: Simplify right side
   1,012,918x = 4,671,770,999,184
5. Step 5: Solve for x
   x = 4,671,770,999,184/1,012,918
6. Step 6: Final answer
   x = 4,612,190.72