Finding the Fourth Proportional to 7,882.88, 11,816.34 and 5,111.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,882.88 : 11,816.34 = 5,111.31 : x
2. Step 2: Convert to fraction form
   7,882.88/11,816.34 = 5,111.31/x
3. Step 3: Cross multiply
   7,882.88x = 11,816.34 × 5,111.31
4. Step 4: Simplify right side
   7,882.88x = 60,396,951.25
5. Step 5: Solve for x
   x = 60,396,951.25/7,882.88
6. Step 6: Final answer
   x = 7,661.79