Finding the Third Proportional to 641,984 and 1,518,221

Step by Step Solution

1. Step 1: Write the proportion equation
   641,984 : 1,518,221 = 1,518,221 : x
2. Step 2: Convert to fraction form
   641,984/1,518,221 = 1,518,221/x
3. Step 3: Cross multiply
   641,984x = 1,518,221 × 1,518,221
4. Step 4: Simplify right side
   641,984x = 2,304,995,004,841
5. Step 5: Solve for x
   x = 2,304,995,004,841/641,984
6. Step 6: Final answer
   x = 3,590,424.38