Finding the Third Proportional to 5,178,900 and 7,840,308

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178,900 : 7,840,308 = 7,840,308 : x
2. Step 2: Convert to fraction form
   5,178,900/7,840,308 = 7,840,308/x
3. Step 3: Cross multiply
   5,178,900x = 7,840,308 × 7,840,308
4. Step 4: Simplify right side
   5,178,900x = 61,470,429,534,864
5. Step 5: Solve for x
   x = 61,470,429,534,864/5,178,900
6. Step 6: Final answer
   x = 11,869,398.82