Finding the Fourth Proportional to 3,682.72, 5,081.74 and 2,111.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,682.72 : 5,081.74 = 2,111.12 : x
2. Step 2: Convert to fraction form
   3,682.72/5,081.74 = 2,111.12/x
3. Step 3: Cross multiply
   3,682.72x = 5,081.74 × 2,111.12
4. Step 4: Simplify right side
   3,682.72x = 10,728,162.95
5. Step 5: Solve for x
   x = 10,728,162.95/3,682.72
6. Step 6: Final answer
   x = 2,913.11