Finding the Fourth Proportional to 3,980.96, 5,493.76 and 2,212.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.96 : 5,493.76 = 2,212.60 : x
2. Step 2: Convert to fraction form
   3,980.96/5,493.76 = 2,212.60/x
3. Step 3: Cross multiply
   3,980.96x = 5,493.76 × 2,212.60
4. Step 4: Simplify right side
   3,980.96x = 12,155,493.38
5. Step 5: Solve for x
   x = 12,155,493.38/3,980.96
6. Step 6: Final answer
   x = 3,053.41