Finding the Third Proportional to 3,940,580 and 8,509,848

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,580 : 8,509,848 = 8,509,848 : x
2. Step 2: Convert to fraction form
   3,940,580/8,509,848 = 8,509,848/x
3. Step 3: Cross multiply
   3,940,580x = 8,509,848 × 8,509,848
4. Step 4: Simplify right side
   3,940,580x = 72,417,512,983,104
5. Step 5: Solve for x
   x = 72,417,512,983,104/3,940,580
6. Step 6: Final answer
   x = 18,377,374.14