Finding the Fourth Proportional to 3,980.60, 5,493.30 and 2,212.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.60 : 5,493.30 = 2,212.28 : x
2. Step 2: Convert to fraction form
   3,980.60/5,493.30 = 2,212.28/x
3. Step 3: Cross multiply
   3,980.60x = 5,493.30 × 2,212.28
4. Step 4: Simplify right side
   3,980.60x = 12,152,717.72
5. Step 5: Solve for x
   x = 12,152,717.72/3,980.60
6. Step 6: Final answer
   x = 3,052.99