Finding the Fourth Proportional to 7,879.69, 11,811.56 and 5,108.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,879.69 : 11,811.56 = 5,108.12 : x
2. Step 2: Convert to fraction form
   7,879.69/11,811.56 = 5,108.12/x
3. Step 3: Cross multiply
   7,879.69x = 11,811.56 × 5,108.12
4. Step 4: Simplify right side
   7,879.69x = 60,334,825.56
5. Step 5: Solve for x
   x = 60,334,825.56/7,879.69
6. Step 6: Final answer
   x = 7,657.01