Finding the Fourth Proportional to 6,911.79, 10,357.86 and 5,324.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,911.79 : 10,357.86 = 5,324.50 : x
2. Step 2: Convert to fraction form
   6,911.79/10,357.86 = 5,324.50/x
3. Step 3: Cross multiply
   6,911.79x = 10,357.86 × 5,324.50
4. Step 4: Simplify right side
   6,911.79x = 55,150,425.57
5. Step 5: Solve for x
   x = 55,150,425.57/6,911.79
6. Step 6: Final answer
   x = 7,979.18