Finding the Fourth Proportional to 12,870, 17,761.68 and 7,282.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870 : 17,761.68 = 7,282.08 : x
2. Step 2: Convert to fraction form
   12,870/17,761.68 = 7,282.08/x
3. Step 3: Cross multiply
   12,870x = 17,761.68 × 7,282.08
4. Step 4: Simplify right side
   12,870x = 129,341,974.69
5. Step 5: Solve for x
   x = 129,341,974.69/12,870
6. Step 6: Final answer
   x = 10,049.88