Finding the Fourth Proportional to 12,870.56, 17,759.20 and 7,204.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.56 : 17,759.20 = 7,204.16 : x
2. Step 2: Convert to fraction form
   12,870.56/17,759.20 = 7,204.16/x
3. Step 3: Cross multiply
   12,870.56x = 17,759.20 × 7,204.16
4. Step 4: Simplify right side
   12,870.56x = 127,940,118.27
5. Step 5: Solve for x
   x = 127,940,118.27/12,870.56
6. Step 6: Final answer
   x = 9,940.52