Finding the Fourth Proportional to 9,399.29, 12,971.39 and 5,150.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.29 : 12,971.39 = 5,150.12 : x
2. Step 2: Convert to fraction form
   9,399.29/12,971.39 = 5,150.12/x
3. Step 3: Cross multiply
   9,399.29x = 12,971.39 × 5,150.12
4. Step 4: Simplify right side
   9,399.29x = 66,804,124.46
5. Step 5: Solve for x
   x = 66,804,124.46/9,399.29
6. Step 6: Final answer
   x = 7,107.36