Finding the Fourth Proportional to 3,966.77, 5,473.61 and 2,198.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,966.77 : 5,473.61 = 2,198.15 : x
2. Step 2: Convert to fraction form
   3,966.77/5,473.61 = 2,198.15/x
3. Step 3: Cross multiply
   3,966.77x = 5,473.61 × 2,198.15
4. Step 4: Simplify right side
   3,966.77x = 12,031,815.82
5. Step 5: Solve for x
   x = 12,031,815.82/3,966.77
6. Step 6: Final answer
   x = 3,033.15