Finding the Fourth Proportional to 11,957.31, 17,928.27 and 5,717.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,957.31 : 17,928.27 = 5,717.18 : x
2. Step 2: Convert to fraction form
   11,957.31/17,928.27 = 5,717.18/x
3. Step 3: Cross multiply
   11,957.31x = 17,928.27 × 5,717.18
4. Step 4: Simplify right side
   11,957.31x = 102,499,191.50
5. Step 5: Solve for x
   x = 102,499,191.50/11,957.31
6. Step 6: Final answer
   x = 8,572.09