Finding the Fourth Proportional to 12,870.24, 17,757.36 and 7,566.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.24 : 17,757.36 = 7,566.72 : x
2. Step 2: Convert to fraction form
   12,870.24/17,757.36 = 7,566.72/x
3. Step 3: Cross multiply
   12,870.24x = 17,757.36 × 7,566.72
4. Step 4: Simplify right side
   12,870.24x = 134,364,971.06
5. Step 5: Solve for x
   x = 134,364,971.06/12,870.24
6. Step 6: Final answer
   x = 10,439.97