Finding the Fourth Proportional to 3,980.82, 5,493.90 and 2,212.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.82 : 5,493.90 = 2,212.56 : x
2. Step 2: Convert to fraction form
   3,980.82/5,493.90 = 2,212.56/x
3. Step 3: Cross multiply
   3,980.82x = 5,493.90 × 2,212.56
4. Step 4: Simplify right side
   3,980.82x = 12,155,583.38
5. Step 5: Solve for x
   x = 12,155,583.38/3,980.82
6. Step 6: Final answer
   x = 3,053.54