Finding the Fourth Proportional to 3,969.12, 5,944.72 and 2,116.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,969.12 : 5,944.72 = 2,116.96 : x
2. Step 2: Convert to fraction form
   3,969.12/5,944.72 = 2,116.96/x
3. Step 3: Cross multiply
   3,969.12x = 5,944.72 × 2,116.96
4. Step 4: Simplify right side
   3,969.12x = 12,584,734.45
5. Step 5: Solve for x
   x = 12,584,734.45/3,969.12
6. Step 6: Final answer
   x = 3,170.66