Finding the Third Proportional to 1,431,486 and 3,120,174

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431,486 : 3,120,174 = 3,120,174 : x
2. Step 2: Convert to fraction form
   1,431,486/3,120,174 = 3,120,174/x
3. Step 3: Cross multiply
   1,431,486x = 3,120,174 × 3,120,174
4. Step 4: Simplify right side
   1,431,486x = 9,735,485,790,276
5. Step 5: Solve for x
   x = 9,735,485,790,276/1,431,486
6. Step 6: Final answer
   x = 6,800,964.72