Finding the Third Proportional to 2,390,315 and 5,178,907

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390,315 : 5,178,907 = 5,178,907 : x
2. Step 2: Convert to fraction form
   2,390,315/5,178,907 = 5,178,907/x
3. Step 3: Cross multiply
   2,390,315x = 5,178,907 × 5,178,907
4. Step 4: Simplify right side
   2,390,315x = 26,821,077,714,649
5. Step 5: Solve for x
   x = 26,821,077,714,649/2,390,315
6. Step 6: Final answer
   x = 11,220,729.37