Finding the Fourth Proportional to 2,042.65, 2,818.91 and 1,111.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.65 : 2,818.91 = 1,111.21 : x
2. Step 2: Convert to fraction form
   2,042.65/2,818.91 = 1,111.21/x
3. Step 3: Cross multiply
   2,042.65x = 2,818.91 × 1,111.21
4. Step 4: Simplify right side
   2,042.65x = 3,132,395.43
5. Step 5: Solve for x
   x = 3,132,395.43/2,042.65
6. Step 6: Final answer
   x = 1,533.50