Finding the Fourth Proportional to 9,390.69, 12,959.12 and 5,198.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,390.69 : 12,959.12 = 5,198.94 : x
2. Step 2: Convert to fraction form
   9,390.69/12,959.12 = 5,198.94/x
3. Step 3: Cross multiply
   9,390.69x = 12,959.12 × 5,198.94
4. Step 4: Simplify right side
   9,390.69x = 67,373,700.33
5. Step 5: Solve for x
   x = 67,373,700.33/9,390.69
6. Step 6: Final answer
   x = 7,174.52