Finding the Fourth Proportional to 3,964.60, 5,471.16 and 2,196.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.60 : 5,471.16 = 2,196.24 : x
2. Step 2: Convert to fraction form
   3,964.60/5,471.16 = 2,196.24/x
3. Step 3: Cross multiply
   3,964.60x = 5,471.16 × 2,196.24
4. Step 4: Simplify right side
   3,964.60x = 12,015,980.44
5. Step 5: Solve for x
   x = 12,015,980.44/3,964.60
6. Step 6: Final answer
   x = 3,030.82