Finding the Third Proportional to 1,008,590 and 2,159,890

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008,590 : 2,159,890 = 2,159,890 : x
2. Step 2: Convert to fraction form
   1,008,590/2,159,890 = 2,159,890/x
3. Step 3: Cross multiply
   1,008,590x = 2,159,890 × 2,159,890
4. Step 4: Simplify right side
   1,008,590x = 4,665,124,812,100
5. Step 5: Solve for x
   x = 4,665,124,812,100/1,008,590
6. Step 6: Final answer
   x = 4,625,392.69