Finding the Fourth Proportional to 21,057.86, 29,050.53 and 14,249.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,057.86 : 29,050.53 = 14,249.45 : x
2. Step 2: Convert to fraction form
   21,057.86/29,050.53 = 14,249.45/x
3. Step 3: Cross multiply
   21,057.86x = 29,050.53 × 14,249.45
4. Step 4: Simplify right side
   21,057.86x = 413,954,093.90
5. Step 5: Solve for x
   x = 413,954,093.90/21,057.86
6. Step 6: Final answer
   x = 19,657.94