Finding the Fourth Proportional to 21,229.56, 29,293.56 and 12,731.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,229.56 : 29,293.56 = 12,731.52 : x
2. Step 2: Convert to fraction form
   21,229.56/29,293.56 = 12,731.52/x
3. Step 3: Cross multiply
   21,229.56x = 29,293.56 × 12,731.52
4. Step 4: Simplify right side
   21,229.56x = 372,951,545.01
5. Step 5: Solve for x
   x = 372,951,545.01/21,229.56
6. Step 6: Final answer
   x = 17,567.56