Finding the Third Proportional to 646,108 and 1,420,574

Step by Step Solution

1. Step 1: Write the proportion equation
   646,108 : 1,420,574 = 1,420,574 : x
2. Step 2: Convert to fraction form
   646,108/1,420,574 = 1,420,574/x
3. Step 3: Cross multiply
   646,108x = 1,420,574 × 1,420,574
4. Step 4: Simplify right side
   646,108x = 2,018,030,489,476
5. Step 5: Solve for x
   x = 2,018,030,489,476/646,108
6. Step 6: Final answer
   x = 3,123,364.03