Finding the Fourth Proportional to 9,993.38, 13,790.52 and 5,516.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,993.38 : 13,790.52 = 5,516.91 : x
2. Step 2: Convert to fraction form
   9,993.38/13,790.52 = 5,516.91/x
3. Step 3: Cross multiply
   9,993.38x = 13,790.52 × 5,516.91
4. Step 4: Simplify right side
   9,993.38x = 76,081,057.69
5. Step 5: Solve for x
   x = 76,081,057.69/9,993.38
6. Step 6: Final answer
   x = 7,613.15