Finding the Third Proportional to 859,400 and 1,871,728

Step by Step Solution

1. Step 1: Write the proportion equation
   859,400 : 1,871,728 = 1,871,728 : x
2. Step 2: Convert to fraction form
   859,400/1,871,728 = 1,871,728/x
3. Step 3: Cross multiply
   859,400x = 1,871,728 × 1,871,728
4. Step 4: Simplify right side
   859,400x = 3,503,365,705,984
5. Step 5: Solve for x
   x = 3,503,365,705,984/859,400
6. Step 6: Final answer
   x = 4,076,525.14