Finding the Fourth Proportional to 1,818.27, 2,506.28 and 1,228.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818.27 : 2,506.28 = 1,228.59 : x
2. Step 2: Convert to fraction form
   1,818.27/2,506.28 = 1,228.59/x
3. Step 3: Cross multiply
   1,818.27x = 2,506.28 × 1,228.59
4. Step 4: Simplify right side
   1,818.27x = 3,079,184.40
5. Step 5: Solve for x
   x = 3,079,184.40/1,818.27
6. Step 6: Final answer
   x = 1,693.47