Finding the Third Proportional to 4,131,978 and 8,927,892

Step by Step Solution

1. Step 1: Write the proportion equation
   4,131,978 : 8,927,892 = 8,927,892 : x
2. Step 2: Convert to fraction form
   4,131,978/8,927,892 = 8,927,892/x
3. Step 3: Cross multiply
   4,131,978x = 8,927,892 × 8,927,892
4. Step 4: Simplify right side
   4,131,978x = 79,707,255,563,664
5. Step 5: Solve for x
   x = 79,707,255,563,664/4,131,978
6. Step 6: Final answer
   x = 19,290,338.81