Finding the Fourth Proportional to 12,391.28, 17,099.88 and 7,357.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,391.28 : 17,099.88 = 7,357.96 : x
2. Step 2: Convert to fraction form
   12,391.28/17,099.88 = 7,357.96/x
3. Step 3: Cross multiply
   12,391.28x = 17,099.88 × 7,357.96
4. Step 4: Simplify right side
   12,391.28x = 125,820,233.04
5. Step 5: Solve for x
   x = 125,820,233.04/12,391.28
6. Step 6: Final answer
   x = 10,153.93