Finding the Third Proportional to 819,128 and 1,282,199

Step by Step Solution

1. Step 1: Write the proportion equation
   819,128 : 1,282,199 = 1,282,199 : x
2. Step 2: Convert to fraction form
   819,128/1,282,199 = 1,282,199/x
3. Step 3: Cross multiply
   819,128x = 1,282,199 × 1,282,199
4. Step 4: Simplify right side
   819,128x = 1,644,034,275,601
5. Step 5: Solve for x
   x = 1,644,034,275,601/819,128
6. Step 6: Final answer
   x = 2,007,054.18