Finding the Fourth Proportional to 12,731.33, 17,571.34 and 7,426.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,731.33 : 17,571.34 = 7,426.15 : x
2. Step 2: Convert to fraction form
   12,731.33/17,571.34 = 7,426.15/x
3. Step 3: Cross multiply
   12,731.33x = 17,571.34 × 7,426.15
4. Step 4: Simplify right side
   12,731.33x = 130,487,406.54
5. Step 5: Solve for x
   x = 130,487,406.54/12,731.33
6. Step 6: Final answer
   x = 10,249.31