Finding the Fourth Proportional to 12,789.09, 17,648.98 and 7,412.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789.09 : 17,648.98 = 7,412.56 : x
2. Step 2: Convert to fraction form
   12,789.09/17,648.98 = 7,412.56/x
3. Step 3: Cross multiply
   12,789.09x = 17,648.98 × 7,412.56
4. Step 4: Simplify right side
   12,789.09x = 130,824,149.39
5. Step 5: Solve for x
   x = 130,824,149.39/12,789.09
6. Step 6: Final answer
   x = 10,229.36