Finding the Fourth Proportional to 9,099.72, 12,558.87 and 5,516.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,099.72 : 12,558.87 = 5,516.12 : x
2. Step 2: Convert to fraction form
   9,099.72/12,558.87 = 5,516.12/x
3. Step 3: Cross multiply
   9,099.72x = 12,558.87 × 5,516.12
4. Step 4: Simplify right side
   9,099.72x = 69,276,265.38
5. Step 5: Solve for x
   x = 69,276,265.38/9,099.72
6. Step 6: Final answer
   x = 7,613.01