Finding the Fourth Proportional to 11,760.24, 17,613.48 and 7,643.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,760.24 : 17,613.48 = 7,643.76 : x
2. Step 2: Convert to fraction form
   11,760.24/17,613.48 = 7,643.76/x
3. Step 3: Cross multiply
   11,760.24x = 17,613.48 × 7,643.76
4. Step 4: Simplify right side
   11,760.24x = 134,633,213.88
5. Step 5: Solve for x
   x = 134,633,213.88/11,760.24
6. Step 6: Final answer
   x = 11,448.17