Finding the Fourth Proportional to 12,404.72, 17,120.54 and 9,576.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.72 : 17,120.54 = 9,576.20 : x
2. Step 2: Convert to fraction form
   12,404.72/17,120.54 = 9,576.20/x
3. Step 3: Cross multiply
   12,404.72x = 17,120.54 × 9,576.20
4. Step 4: Simplify right side
   12,404.72x = 163,949,715.15
5. Step 5: Solve for x
   x = 163,949,715.15/12,404.72
6. Step 6: Final answer
   x = 13,216.72