Finding the Fourth Proportional to 3,964.88, 5,471.61 and 2,196.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.88 : 5,471.61 = 2,196.53 : x
2. Step 2: Convert to fraction form
   3,964.88/5,471.61 = 2,196.53/x
3. Step 3: Cross multiply
   3,964.88x = 5,471.61 × 2,196.53
4. Step 4: Simplify right side
   3,964.88x = 12,018,555.51
5. Step 5: Solve for x
   x = 12,018,555.51/3,964.88
6. Step 6: Final answer
   x = 3,031.25