Finding the Fourth Proportional to 3,980.72, 5,493.55 and 2,212.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.72 : 5,493.55 = 2,212.29 : x
2. Step 2: Convert to fraction form
   3,980.72/5,493.55 = 2,212.29/x
3. Step 3: Cross multiply
   3,980.72x = 5,493.55 × 2,212.29
4. Step 4: Simplify right side
   3,980.72x = 12,153,332.64
5. Step 5: Solve for x
   x = 12,153,332.64/3,980.72
6. Step 6: Final answer
   x = 3,053.05