Finding the Fourth Proportional to 7,359.36, 10,978.76 and 7,158.48

Step by Step Solution

1. Step 1: Write the proportion equation
   7,359.36 : 10,978.76 = 7,158.48 : x
2. Step 2: Convert to fraction form
   7,359.36/10,978.76 = 7,158.48/x
3. Step 3: Cross multiply
   7,359.36x = 10,978.76 × 7,158.48
4. Step 4: Simplify right side
   7,359.36x = 78,591,233.88
5. Step 5: Solve for x
   x = 78,591,233.88/7,359.36
6. Step 6: Final answer
   x = 10,679.09