Finding the Fourth Proportional to 3,980.56, 5,493.18 and 2,212.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.56 : 5,493.18 = 2,212.24 : x
2. Step 2: Convert to fraction form
   3,980.56/5,493.18 = 2,212.24/x
3. Step 3: Cross multiply
   3,980.56x = 5,493.18 × 2,212.24
4. Step 4: Simplify right side
   3,980.56x = 12,152,232.52
5. Step 5: Solve for x
   x = 12,152,232.52/3,980.56
6. Step 6: Final answer
   x = 3,052.90