Finding the Third Proportional to 1,228,128 and 1,871,904

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228,128 : 1,871,904 = 1,871,904 : x
2. Step 2: Convert to fraction form
   1,228,128/1,871,904 = 1,871,904/x
3. Step 3: Cross multiply
   1,228,128x = 1,871,904 × 1,871,904
4. Step 4: Simplify right side
   1,228,128x = 3,504,024,585,216
5. Step 5: Solve for x
   x = 3,504,024,585,216/1,228,128
6. Step 6: Final answer
   x = 2,853,142.82