Finding the Fourth Proportional to 3,965.63, 5,472.09 and 2,196.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.63 : 5,472.09 = 2,196.99 : x
2. Step 2: Convert to fraction form
   3,965.63/5,472.09 = 2,196.99/x
3. Step 3: Cross multiply
   3,965.63x = 5,472.09 × 2,196.99
4. Step 4: Simplify right side
   3,965.63x = 12,022,127.01
5. Step 5: Solve for x
   x = 12,022,127.01/3,965.63
6. Step 6: Final answer
   x = 3,031.58