Finding the Fourth Proportional to 3,979.72, 5,492.02 and 2,211.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,979.72 : 5,492.02 = 2,211.34 : x
2. Step 2: Convert to fraction form
   3,979.72/5,492.02 = 2,211.34/x
3. Step 3: Cross multiply
   3,979.72x = 5,492.02 × 2,211.34
4. Step 4: Simplify right side
   3,979.72x = 12,144,723.51
5. Step 5: Solve for x
   x = 12,144,723.51/3,979.72
6. Step 6: Final answer
   x = 3,051.65