Finding the Fourth Proportional to 21,761,910.64, 30,031,436.49 and 11,972,144.73

Step by Step Solution

1. Step 1: Write the proportion equation
   21,761,910.64 : 30,031,436.49 = 11,972,144.73 : x
2. Step 2: Convert to fraction form
   21,761,910.64/30,031,436.49 = 11,972,144.73/x
3. Step 3: Cross multiply
   21,761,910.64x = 30,031,436.49 × 11,972,144.73
4. Step 4: Simplify right side
   21,761,910.64x = 359,540,704,003,074.25
5. Step 5: Solve for x
   x = 359,540,704,003,074.25/21,761,910.64
6. Step 6: Final answer
   x = 16,521,559.62