Finding the Fourth Proportional to 11,818.52, 17,728.92 and 5,971.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,818.52 : 17,728.92 = 5,971.40 : x
2. Step 2: Convert to fraction form
   11,818.52/17,728.92 = 5,971.40/x
3. Step 3: Cross multiply
   11,818.52x = 17,728.92 × 5,971.40
4. Step 4: Simplify right side
   11,818.52x = 105,866,472.89
5. Step 5: Solve for x
   x = 105,866,472.89/11,818.52
6. Step 6: Final answer
   x = 8,957.68