Finding the Fourth Proportional to 3,980.08, 5,492.46 and 2,211.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.08 : 5,492.46 = 2,211.61 : x
2. Step 2: Convert to fraction form
   3,980.08/5,492.46 = 2,211.61/x
3. Step 3: Cross multiply
   3,980.08x = 5,492.46 × 2,211.61
4. Step 4: Simplify right side
   3,980.08x = 12,147,179.46
5. Step 5: Solve for x
   x = 12,147,179.46/3,980.08
6. Step 6: Final answer
   x = 3,051.99