Finding the Fourth Proportional to 9,007.16, 12,438.45 and 8,516.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,007.16 : 12,438.45 = 8,516.30 : x
2. Step 2: Convert to fraction form
   9,007.16/12,438.45 = 8,516.30/x
3. Step 3: Cross multiply
   9,007.16x = 12,438.45 × 8,516.30
4. Step 4: Simplify right side
   9,007.16x = 105,929,509.54
5. Step 5: Solve for x
   x = 105,929,509.54/9,007.16
6. Step 6: Final answer
   x = 11,760.60