Finding the Fourth Proportional to 8,116.56, 11,171.70 and 5,754.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,116.56 : 11,171.70 = 5,754.60 : x
2. Step 2: Convert to fraction form
   8,116.56/11,171.70 = 5,754.60/x
3. Step 3: Cross multiply
   8,116.56x = 11,171.70 × 5,754.60
4. Step 4: Simplify right side
   8,116.56x = 64,288,664.82
5. Step 5: Solve for x
   x = 64,288,664.82/8,116.56
6. Step 6: Final answer
   x = 7,920.68