Finding the Third Proportional to 645,990 and 1,362,594

Step by Step Solution

1. Step 1: Write the proportion equation
   645,990 : 1,362,594 = 1,362,594 : x
2. Step 2: Convert to fraction form
   645,990/1,362,594 = 1,362,594/x
3. Step 3: Cross multiply
   645,990x = 1,362,594 × 1,362,594
4. Step 4: Simplify right side
   645,990x = 1,856,662,408,836
5. Step 5: Solve for x
   x = 1,856,662,408,836/645,990
6. Step 6: Final answer
   x = 2,874,134.91