Finding the Fourth Proportional to 3,979.82, 5,492.32 and 2,211.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,979.82 : 5,492.32 = 2,211.39 : x
2. Step 2: Convert to fraction form
   3,979.82/5,492.32 = 2,211.39/x
3. Step 3: Cross multiply
   3,979.82x = 5,492.32 × 2,211.39
4. Step 4: Simplify right side
   3,979.82x = 12,145,661.52
5. Step 5: Solve for x
   x = 12,145,661.52/3,979.82
6. Step 6: Final answer
   x = 3,051.81