Finding the Third Proportional to 1,170,990 and 2,556,279

Step by Step Solution

1. Step 1: Write the proportion equation
   1,170,990 : 2,556,279 = 2,556,279 : x
2. Step 2: Convert to fraction form
   1,170,990/2,556,279 = 2,556,279/x
3. Step 3: Cross multiply
   1,170,990x = 2,556,279 × 2,556,279
4. Step 4: Simplify right side
   1,170,990x = 6,534,562,325,841
5. Step 5: Solve for x
   x = 6,534,562,325,841/1,170,990
6. Step 6: Final answer
   x = 5,580,374.15