Finding the Fourth Proportional to 21,501.69, 29,671.31 and 11,942.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,501.69 : 29,671.31 = 11,942.18 : x
2. Step 2: Convert to fraction form
   21,501.69/29,671.31 = 11,942.18/x
3. Step 3: Cross multiply
   21,501.69x = 29,671.31 × 11,942.18
4. Step 4: Simplify right side
   21,501.69x = 354,340,284.52
5. Step 5: Solve for x
   x = 354,340,284.52/21,501.69
6. Step 6: Final answer
   x = 16,479.65