Finding the Fourth Proportional to 21,904.26, 30,217.04 and 12,947.46

Step by Step Solution

1. Step 1: Write the proportion equation
   21,904.26 : 30,217.04 = 12,947.46 : x
2. Step 2: Convert to fraction form
   21,904.26/30,217.04 = 12,947.46/x
3. Step 3: Cross multiply
   21,904.26x = 30,217.04 × 12,947.46
4. Step 4: Simplify right side
   21,904.26x = 391,233,916.72
5. Step 5: Solve for x
   x = 391,233,916.72/21,904.26
6. Step 6: Final answer
   x = 17,861.09