Finding the Fourth Proportional to 9,391.59, 12,960.41 and 5,199.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,391.59 : 12,960.41 = 5,199.75 : x
2. Step 2: Convert to fraction form
   9,391.59/12,960.41 = 5,199.75/x
3. Step 3: Cross multiply
   9,391.59x = 12,960.41 × 5,199.75
4. Step 4: Simplify right side
   9,391.59x = 67,390,865.90
5. Step 5: Solve for x
   x = 67,390,865.90/9,391.59
6. Step 6: Final answer
   x = 7,175.66