Finding the Fourth Proportional to 3,956.88, 5,460.28 and 2,164.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,956.88 : 5,460.28 = 2,164.00 : x
2. Step 2: Convert to fraction form
   3,956.88/5,460.28 = 2,164.00/x
3. Step 3: Cross multiply
   3,956.88x = 5,460.28 × 2,164.00
4. Step 4: Simplify right side
   3,956.88x = 11,816,057.85
5. Step 5: Solve for x
   x = 11,816,057.85/3,956.88
6. Step 6: Final answer
   x = 2,986.20