Finding the Fourth Proportional to 2,411.28, 3,612.24 and 1,111.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,411.28 : 3,612.24 = 1,111.68 : x
2. Step 2: Convert to fraction form
   2,411.28/3,612.24 = 1,111.68/x
3. Step 3: Cross multiply
   2,411.28x = 3,612.24 × 1,111.68
4. Step 4: Simplify right side
   2,411.28x = 4,015,654.96
5. Step 5: Solve for x
   x = 4,015,654.96/2,411.28
6. Step 6: Final answer
   x = 1,665.36