Finding the Fourth Proportional to 9,371.14, 12,931.59 and 5,179.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,371.14 : 12,931.59 = 5,179.48 : x
2. Step 2: Convert to fraction form
   9,371.14/12,931.59 = 5,179.48/x
3. Step 3: Cross multiply
   9,371.14x = 12,931.59 × 5,179.48
4. Step 4: Simplify right side
   9,371.14x = 66,978,911.77
5. Step 5: Solve for x
   x = 66,978,911.77/9,371.14
6. Step 6: Final answer
   x = 7,147.36