Finding the Fourth Proportional to 12,875, 17,768.60 and 7,287.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,875 : 17,768.60 = 7,287.08 : x
2. Step 2: Convert to fraction form
   12,875/17,768.60 = 7,287.08/x
3. Step 3: Cross multiply
   12,875x = 17,768.60 × 7,287.08
4. Step 4: Simplify right side
   12,875x = 129,481,209.69
5. Step 5: Solve for x
   x = 129,481,209.69/12,875
6. Step 6: Final answer
   x = 10,056.79