Finding the Third Proportional to 5,211,718 and 7,858,588

Step by Step Solution

1. Step 1: Write the proportion equation
   5,211,718 : 7,858,588 = 7,858,588 : x
2. Step 2: Convert to fraction form
   5,211,718/7,858,588 = 7,858,588/x
3. Step 3: Cross multiply
   5,211,718x = 7,858,588 × 7,858,588
4. Step 4: Simplify right side
   5,211,718x = 61,757,405,353,744
5. Step 5: Solve for x
   x = 61,757,405,353,744/5,211,718
6. Step 6: Final answer
   x = 11,849,721.22