Finding the Third Proportional to 5,131,978 and 7,174,823

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131,978 : 7,174,823 = 7,174,823 : x
2. Step 2: Convert to fraction form
   5,131,978/7,174,823 = 7,174,823/x
3. Step 3: Cross multiply
   5,131,978x = 7,174,823 × 7,174,823
4. Step 4: Simplify right side
   5,131,978x = 51,478,085,081,329
5. Step 5: Solve for x
   x = 51,478,085,081,329/5,131,978
6. Step 6: Final answer
   x = 10,030,846.80