Finding the Fourth Proportional to 3,979.92, 5,492.61 and 2,211.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,979.92 : 5,492.61 = 2,211.69 : x
2. Step 2: Convert to fraction form
   3,979.92/5,492.61 = 2,211.69/x
3. Step 3: Cross multiply
   3,979.92x = 5,492.61 × 2,211.69
4. Step 4: Simplify right side
   3,979.92x = 12,147,950.61
5. Step 5: Solve for x
   x = 12,147,950.61/3,979.92
6. Step 6: Final answer
   x = 3,052.31