Finding the Fourth Proportional to 11,308.80, 16,957.17 and 3,911.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,308.80 : 16,957.17 = 3,911.34 : x
2. Step 2: Convert to fraction form
   11,308.80/16,957.17 = 3,911.34/x
3. Step 3: Cross multiply
   11,308.80x = 16,957.17 × 3,911.34
4. Step 4: Simplify right side
   11,308.80x = 66,325,257.31
5. Step 5: Solve for x
   x = 66,325,257.31/11,308.80
6. Step 6: Final answer
   x = 5,864.92