Finding the Fourth Proportional to 1,818.05, 2,509.58 and 1,228.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818.05 : 2,509.58 = 1,228.37 : x
2. Step 2: Convert to fraction form
   1,818.05/2,509.58 = 1,228.37/x
3. Step 3: Cross multiply
   1,818.05x = 2,509.58 × 1,228.37
4. Step 4: Simplify right side
   1,818.05x = 3,082,683.31
5. Step 5: Solve for x
   x = 3,082,683.31/1,818.05
6. Step 6: Final answer
   x = 1,695.60