Finding the Third Proportional to 663,009 and 1,431,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   663,009 : 1,431,661.50 = 1,431,661.50 : x
2. Step 2: Convert to fraction form
   663,009/1,431,661.50 = 1,431,661.50/x
3. Step 3: Cross multiply
   663,009x = 1,431,661.50 × 1,431,661.50
4. Step 4: Simplify right side
   663,009x = 2,049,654,650,582.25
5. Step 5: Solve for x
   x = 2,049,654,650,582.25/663,009
6. Step 6: Final answer
   x = 3,091,443.18