Finding the Fourth Proportional to 1,818.17, 2,508.43 and 1,189.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818.17 : 2,508.43 = 1,189.06 : x
2. Step 2: Convert to fraction form
   1,818.17/2,508.43 = 1,189.06/x
3. Step 3: Cross multiply
   1,818.17x = 2,508.43 × 1,189.06
4. Step 4: Simplify right side
   1,818.17x = 2,982,673.78
5. Step 5: Solve for x
   x = 2,982,673.78/1,818.17
6. Step 6: Final answer
   x = 1,640.48