Finding the Fourth Proportional to 12,871.54, 17,758.59 and 7,205.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,871.54 : 17,758.59 = 7,205.45 : x
2. Step 2: Convert to fraction form
   12,871.54/17,758.59 = 7,205.45/x
3. Step 3: Cross multiply
   12,871.54x = 17,758.59 × 7,205.45
4. Step 4: Simplify right side
   12,871.54x = 127,958,632.32
5. Step 5: Solve for x
   x = 127,958,632.32/12,871.54
6. Step 6: Final answer
   x = 9,941.21