Finding the Third Proportional to 1,431,821 and 3,087,691

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431,821 : 3,087,691 = 3,087,691 : x
2. Step 2: Convert to fraction form
   1,431,821/3,087,691 = 3,087,691/x
3. Step 3: Cross multiply
   1,431,821x = 3,087,691 × 3,087,691
4. Step 4: Simplify right side
   1,431,821x = 9,533,835,711,481
5. Step 5: Solve for x
   x = 9,533,835,711,481/1,431,821
6. Step 6: Final answer
   x = 6,658,538.82