Finding the Third Proportional to 1,291,081.78 and 1,992,169.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,081.78 : 1,992,169.69 = 1,992,169.69 : x
2. Step 2: Convert to fraction form
   1,291,081.78/1,992,169.69 = 1,992,169.69/x
3. Step 3: Cross multiply
   1,291,081.78x = 1,992,169.69 × 1,992,169.69
4. Step 4: Simplify right side
   1,291,081.78x = 3,968,740,063,793.85
5. Step 5: Solve for x
   x = 3,968,740,063,793.85/1,291,081.78
6. Step 6: Final answer
   x = 3,073,964.89