Finding the Fourth Proportional to 3,964.32, 5,471.07 and 2,196.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.32 : 5,471.07 = 2,196.09 : x
2. Step 2: Convert to fraction form
   3,964.32/5,471.07 = 2,196.09/x
3. Step 3: Cross multiply
   3,964.32x = 5,471.07 × 2,196.09
4. Step 4: Simplify right side
   3,964.32x = 12,014,962.12
5. Step 5: Solve for x
   x = 12,014,962.12/3,964.32
6. Step 6: Final answer
   x = 3,030.78