Finding the Fourth Proportional to 2,042.61, 2,818.78 and 1,111.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.61 : 2,818.78 = 1,111.11 : x
2. Step 2: Convert to fraction form
   2,042.61/2,818.78 = 1,111.11/x
3. Step 3: Cross multiply
   2,042.61x = 2,818.78 × 1,111.11
4. Step 4: Simplify right side
   2,042.61x = 3,131,974.65
5. Step 5: Solve for x
   x = 3,131,974.65/2,042.61
6. Step 6: Final answer
   x = 1,533.32