Finding the Fourth Proportional to 7,604.89, 11,399.59 and 5,139.96

Step by Step Solution

1. Step 1: Write the proportion equation
   7,604.89 : 11,399.59 = 5,139.96 : x
2. Step 2: Convert to fraction form
   7,604.89/11,399.59 = 5,139.96/x
3. Step 3: Cross multiply
   7,604.89x = 11,399.59 × 5,139.96
4. Step 4: Simplify right side
   7,604.89x = 58,593,371.38
5. Step 5: Solve for x
   x = 58,593,371.38/7,604.89
6. Step 6: Final answer
   x = 7,704.70