Finding the Third Proportional to 1,438,686 and 3,151,476

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438,686 : 3,151,476 = 3,151,476 : x
2. Step 2: Convert to fraction form
   1,438,686/3,151,476 = 3,151,476/x
3. Step 3: Cross multiply
   1,438,686x = 3,151,476 × 3,151,476
4. Step 4: Simplify right side
   1,438,686x = 9,931,800,978,576
5. Step 5: Solve for x
   x = 9,931,800,978,576/1,438,686
6. Step 6: Final answer
   x = 6,903,383.35