Finding the Fourth Proportional to 21,674.31, 29,906.66 and 12,114.39

Step by Step Solution

1. Step 1: Write the proportion equation
   21,674.31 : 29,906.66 = 12,114.39 : x
2. Step 2: Convert to fraction form
   21,674.31/29,906.66 = 12,114.39/x
3. Step 3: Cross multiply
   21,674.31x = 29,906.66 × 12,114.39
4. Step 4: Simplify right side
   21,674.31x = 362,300,747.76
5. Step 5: Solve for x
   x = 362,300,747.76/21,674.31
6. Step 6: Final answer
   x = 16,715.68