Finding the Fourth Proportional to 21,911,245.72, 30,238,414.50 and 12,121,524.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,911,245.72 : 30,238,414.50 = 12,121,524.16 : x
2. Step 2: Convert to fraction form
   21,911,245.72/30,238,414.50 = 12,121,524.16/x
3. Step 3: Cross multiply
   21,911,245.72x = 30,238,414.50 × 12,121,524.16
4. Step 4: Simplify right side
   21,911,245.72x = 366,535,671,921,844.31
5. Step 5: Solve for x
   x = 366,535,671,921,844.31/21,911,245.72
6. Step 6: Final answer
   x = 16,728,198.69