Finding the Fourth Proportional to 9,391.51, 12,960.09 and 5,412.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,391.51 : 12,960.09 = 5,412.38 : x
2. Step 2: Convert to fraction form
   9,391.51/12,960.09 = 5,412.38/x
3. Step 3: Cross multiply
   9,391.51x = 12,960.09 × 5,412.38
4. Step 4: Simplify right side
   9,391.51x = 70,144,931.91
5. Step 5: Solve for x
   x = 70,144,931.91/9,391.51
6. Step 6: Final answer
   x = 7,468.97