Finding the Third Proportional to 663,254 and 1,421,128

Step by Step Solution

1. Step 1: Write the proportion equation
   663,254 : 1,421,128 = 1,421,128 : x
2. Step 2: Convert to fraction form
   663,254/1,421,128 = 1,421,128/x
3. Step 3: Cross multiply
   663,254x = 1,421,128 × 1,421,128
4. Step 4: Simplify right side
   663,254x = 2,019,604,792,384
5. Step 5: Solve for x
   x = 2,019,604,792,384/663,254
6. Step 6: Final answer
   x = 3,044,994.52