Finding the Fourth Proportional to 2,111.52, 2,911.92 and 1,449.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.52 : 2,911.92 = 1,449.12 : x
2. Step 2: Convert to fraction form
   2,111.52/2,911.92 = 1,449.12/x
3. Step 3: Cross multiply
   2,111.52x = 2,911.92 × 1,449.12
4. Step 4: Simplify right side
   2,111.52x = 4,219,721.51
5. Step 5: Solve for x
   x = 4,219,721.51/2,111.52
6. Step 6: Final answer
   x = 1,998.43