Finding the Third Proportional to 2,978,904 and 6,430,116

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978,904 : 6,430,116 = 6,430,116 : x
2. Step 2: Convert to fraction form
   2,978,904/6,430,116 = 6,430,116/x
3. Step 3: Cross multiply
   2,978,904x = 6,430,116 × 6,430,116
4. Step 4: Simplify right side
   2,978,904x = 41,346,391,773,456
5. Step 5: Solve for x
   x = 41,346,391,773,456/2,978,904
6. Step 6: Final answer
   x = 13,879,732.87