Finding the Fourth Proportional to 1,818.14, 2,721.82 and 1,122.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818.14 : 2,721.82 = 1,122.57 : x
2. Step 2: Convert to fraction form
   1,818.14/2,721.82 = 1,122.57/x
3. Step 3: Cross multiply
   1,818.14x = 2,721.82 × 1,122.57
4. Step 4: Simplify right side
   1,818.14x = 3,055,429.48
5. Step 5: Solve for x
   x = 3,055,429.48/1,818.14
6. Step 6: Final answer
   x = 1,680.53