Finding the Fourth Proportional to 12,731.67, 17,571.82 and 7,426.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,731.67 : 17,571.82 = 7,426.49 : x
2. Step 2: Convert to fraction form
   12,731.67/17,571.82 = 7,426.49/x
3. Step 3: Cross multiply
   12,731.67x = 17,571.82 × 7,426.49
4. Step 4: Simplify right side
   12,731.67x = 130,496,820.52
5. Step 5: Solve for x
   x = 130,496,820.52/12,731.67
6. Step 6: Final answer
   x = 10,249.78