Finding the Third Proportional to 1,291,670 and 1,992,009

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,670 : 1,992,009 = 1,992,009 : x
2. Step 2: Convert to fraction form
   1,291,670/1,992,009 = 1,992,009/x
3. Step 3: Cross multiply
   1,291,670x = 1,992,009 × 1,992,009
4. Step 4: Simplify right side
   1,291,670x = 3,968,099,856,081
5. Step 5: Solve for x
   x = 3,968,099,856,081/1,291,670
6. Step 6: Final answer
   x = 3,072,069.38