Finding the Fourth Proportional to 3,980.59, 5,493.49 and 2,212.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.59 : 5,493.49 = 2,212.31 : x
2. Step 2: Convert to fraction form
   3,980.59/5,493.49 = 2,212.31/x
3. Step 3: Cross multiply
   3,980.59x = 5,493.49 × 2,212.31
4. Step 4: Simplify right side
   3,980.59x = 12,153,269.86
5. Step 5: Solve for x
   x = 12,153,269.86/3,980.59
6. Step 6: Final answer
   x = 3,053.13