Finding the Fourth Proportional to 21,345.86, 29,454.56 and 11,914.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,345.86 : 29,454.56 = 11,914.82 : x
2. Step 2: Convert to fraction form
   21,345.86/29,454.56 = 11,914.82/x
3. Step 3: Cross multiply
   21,345.86x = 29,454.56 × 11,914.82
4. Step 4: Simplify right side
   21,345.86x = 350,945,780.58
5. Step 5: Solve for x
   x = 350,945,780.58/21,345.86
6. Step 6: Final answer
   x = 16,440.93