Finding the Fourth Proportional to 3,980.26, 5,492.71 and 2,211.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.26 : 5,492.71 = 2,211.83 : x
2. Step 2: Convert to fraction form
   3,980.26/5,492.71 = 2,211.83/x
3. Step 3: Cross multiply
   3,980.26x = 5,492.71 × 2,211.83
4. Step 4: Simplify right side
   3,980.26x = 12,148,940.76
5. Step 5: Solve for x
   x = 12,148,940.76/3,980.26
6. Step 6: Final answer
   x = 3,052.30